Collusion in poker can be profitable in many ways, it can be as CryptoPrometheus described more or less, but it can vary from two buddies softplaying each others in a tournament "because they won't hurt each other", to professionnal players colluding to prey on the amateurs. in a cash game for example, two or more skilled players could exploit the weaker player at a bigger rate then they otherwise would by exchanging information on how are they going to play on each street in real time. colluding in tournaments can be very profitable also if done right. Some poker formats are already infested with collusion, Sit nGo's are dying because of 'Cartels' colluding and splitting profit (google for more details)
Even the established centralized platforms (ie pokerstars etc) can't stop it, soI'm really curious about how these type of issues are going to be adressed in the future.

This seems very interesting but how are you going to adress game integrity issues? I can't find anything about it.
ie: 2 or more players colluding to win a tournament, in a poker cash game format this could be a huge deal also.