Different Networks??

Does anyone know how many different networks run most of these sites? I just started online again after about a 10 year hiatus from the online world, and I play on one site, but I am playing against others from many different sites. I also see a lot of obvious collusion...2 players at the table that pop and repop all day and then check down against each other when the rest of table folds...obvious! Seems there is no way to regulate this either. And the types of tourneys! Whats with all this 3 hour late registration? I like no rebuys, no addons, and no late reg! The days of most of the sites having there own network seem done and the fast deposit/withdrawal is even worse. They have no problem taking your money, but only let you cash out XX$ each month. It does seem like one big ponzi scheme. I am trying to take advantage of action without having to drive to AC or find a good underground place and it is hard. Any suggestions? Thanks

I don't mind the slight late-registration myself, in terms of 15 minute rounds, to a maximum of somewhere around 4. I see tournaments that have late registration for 3000 chips when the blinds are 400/800. Don't like that at all, as it just causes too many people to be going all-in crazy to get a lot of chips quickly (especially in an unlimited rebuy).

Overall, I'm not a big fan of rebuy/addon but it can be used to your advantage at times. There's a lot of MTT on most main sites (partypoker, pokerstars, FullTilt) that don't allow rebuys or addons - perhaps even some left without late registration.

A lot of my play is limited to MTT as there can easily be collusion on the net. If you feel it's out there so clearly - report it to the site and find yourself a new table quickly.

Equity Poker Network(EPN[FONT=arial, sans-serif]) (I play on Full Flush).
Since I'm not a fan of 3 hour late registration, I play more there than anywhere.
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there are rooms which are part of the network, and there are tournaments common for rooms in that network, there you can meet players from other room
you can report collusion

Lots of different networks depending apon ur country..PS is best but not for USA players