The most common way to control traffic on a game portal category description is using filters. Filters are usually based on age, gender, and geography, but they can also be filtered by interests or type of games. The downside to this method is that the information you want might not show up in the results because it doesn't match your filter criteria.
Another way to control traffic is to use Match 3 games as a primary category since it is a popular genre with a lot of traffic and cross-platform. This means users playing it on their console or PC will probably play it on their mobile device as well.
Match 3 games also help smaller portals get their foot in the door, and it also helps control traffic so that users will see what they want to see. It's a win-win situation for everyone involved.
Skewing your results using filters might not be the best idea because you don't know what you will get with the results. Match 3 can help solve this problem by giving you more control of your traffic.