When comparing TIGSource vs Steam Greenlight, the Slant community recommends Steam Greenlight for most people. In the question“What are the best ways to promote an indie game?” Steam Greenlight is ranked 4th while TIGSource is ranked 5th. The most important reason people chose Steam Greenlight is:
The Concepts section of Greenlight allows incomplete projects to be put on display and receive feedback, including mock-voting as if they were full Greenlight submissions. This can be a valuable tool for refining design, presentation and marketing techniques.
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Pros
Pro Great for networking with other indie devs and reviewers
Spontaneous endorsements from bloggers, reviewers and other developers can generate as much or more interest as any direct effort on your part. TIGSource is positioned as a community for indie developers, making it one of the best places to catch the eye of your peers.
Pro TIGSource staff might take interest and feature your game
The contributing editors of TIGSource are free to indulge their personal gaming interests, and frequently promote titles that they feel stand out in some way.
Pro You can engage the community
The TIGSource forums have a lively community of indie game fans and other developers with over 20,000 members. The best way to build support for your game and company is to embrace the community and hear their input.
Pro Greenlight Concepts section can help get early feedback
The Concepts section of Greenlight allows incomplete projects to be put on display and receive feedback, including mock-voting as if they were full Greenlight submissions. This can be a valuable tool for refining design, presentation and marketing techniques.
Pro The largest and best-known PC distribution service
Steam's user base is over ten times that of the next nearest competitor, making it by far the largest single marketplace.
Cons
Con Limited control over presentation
TIGSource Forums are designed to support a community of developers, not as an ideal marketing platform. Like most forums, you can start new topics and have limited control over the formatting of your own posts only.
Con Registration costs $100
In order to submit games to Greenlight at all, you must first purchase a $100 activation for your Steam account. Note that this does not represent profit for Valve: all proceeds are donated to charity. It is strictly a barrier to entry.
Con Approval process is a competitive market
The Greenlight submissions with the most votes are approved in arbitrary batches, generally 50 to 100 per month. No metric is used other than raw quantity of positive votes.