1. Advertising
One of the oldest money-making sources, this model is under constant evolution. With the general internet population having access to ad-blocking tools, the industry has gone on to employ complex and creative methods to stay relevant. For example, Yahoo, Google.

 

2. Freemium model
Perhaps the most common model used by Web services. The idea here is to sell a basic free product to as many customers as possible, but keep the premium features exclusively for paying customers. For instance,  LinkedIn, , Slideshare, Skype 

 

Newspapers, Gym, Magazines – yes, all of them use a subscription model. So, it has been existent since long.In the digital domain, software, which was once dominated by the licensing model, is slowly moving towards a subscription model. Generally, unlimited usage is offered, but a few have a specified cap above which they charge a higher rate. For example, Amazon Prime

1) Web Catalog Revenue Models. In this revenue model, it is adapted from mail-order model which the seller established brand image and the information is printed and mailed to the prospective buyers. Its is flexibility because the orders and payments placed through website or telephone or mail. For example : Computers and consumer electronics
2) Digital Content Subscription Revenue Models. The firms owning written information or information machanism. For example LexisNexis and Lexis.com which offers variety of information service and offers original legal information product.
3) Advertising- Supported Revenue Models.It provides free programming and advertising messages. It helps to keep visitors at site and attracting repeat visitors and exposed to more advertising in a sticky site. For example : HowStuffWorks 

 1. Subscription

A subscription model is a great example of recurring revenue strategy. This is a common strategy among SAAS, entertainment services, and online hosting companies like Netflix, Youtube, etc. where they provide the specified service for a pre-determined periodic cost.

2. Advertising
An advertising revenue model is usually adopted by media houses and information providers which usually earn money by including advertisements in the content provided. This revenue model is widespread in both offline and online businesses and the company makes money by charging the advertiser: per size of the space offered, thousand impressions or per click on the advertisement.

3. Fee-for-service

Unlike other service-based models, a fee-for-service model charges the customers for the type of and times the service is provided. This is a pay-as-you-go or pay-per-usage revenue model where the customer pays only for the services he actually used. This revenue model is common in telecom and cloud-based services industries. 

Subscription model 
In the subscription model, the business provides a product or service to a customer who in return pays a pre-determined fee at contracted periods of time to the business. The customer will be required to pay the fee until the contract with the business is terminated or expires, even if he is not using the product or service but is still adhering to the contract. Possible examples are flat-rate cellular services, magazines and newspapers. 

Advertising model 
The advertising model is often used by Media businesses which use their platforms where content is provided to the customer as an advertising space 

A range of documents can be accessed for a period of a month or typically a year.For example, I subscribed to FT.com for access to the digital technology section for around‚ 80 GBP per year a few years ago. Smart Insights Expert members have an annual subscription in this form.

Here payment occurs for single access to a document, video or music clip which can be downloaded. It may or may not be protected with a password or Digital Rights Management.For example, I've paid to access detailed best practice guides on Internet marketing from Marketing Sherpa.Digital rights management (DRM) The use of different technologies to protect the distribution of digital services or content such as software, music, movies, or other digital data. 
 

The data a site owner has about its customers is also potentially valuable since it can send different forms of e-mail to its customers if they have given their permission that they are happy to receive an e-mail either from the publisher or third parties. The site owner can charge for adverts placed in its newsletter or can deliver a separate message on behalf of the advertiser (sometimes known as list rental). A related approach is to conduct market research with the site customers. 

·Advertising revenue model: this model derives its revenue by the mode of paid advertisements on the website. Advertisements methods like Google Add sense is mostly used in this model. The website owners like to attract more visitors to their website which would attract more people to advertise on their website. 

 

·Subscription revenue model:  The firms that use this model make users to pay for the services they offer to them. This paid subscription can be either monthly or yearly. 

 

·Transaction fee revenue model: Mostly this service is used by payment portals. They charge fees for every transaction done through them. 

 

·Sale revenue model: In this model company derives profit by direct selling products or providing services. 

 

·Affiliate revenue model: The site using this model refers to affiliated website. They generate revenue by referring user to the affiliated website.