I have an account on Bovada that I use occasionally. I have an account over on Juicy Stakes...IIRC, they used to be Cake. That one's rarely used. (It's only got a small amount of money in it, nothing I care about. For that matter, I cashed out most of my Bovada stake.) Juicy Stakes had poor traffic; didn't like their SNGs. Bovada's got decent SNGs, and I actually have enough player points to cash into some of their qualifiers. I might do that, just for grins.
I don't play pot limit; I don't understand the nuances well enough, and how they influence betting. ESPECIALLY in Omaha, where there are so many potential outs, so often. I think I'd like Omaha...better yet, hi-lo Omaha...but it's a game that needs a lot of work. I have yet to see a play-money game that wasn't dominated by jackasses; there's nothing to learn about tactical betting when they go all in regularly. You see this in big freerolls, or very cheap qualifying events (something like a $1 buy-in, top 5% win a ticket to a $15 buy-in event). Played a few of those, ALWAYS expecting to see an all in within 3 hands. I was rarely disappointed. (And this was in a middle-stack event. 1500 chips, maybe 10 minute rounds, starting at 10/20, so everyone starts with 50 rounds/75 big blinds, and the structure didn't push the blinds/antes all that fast.)
And Omaha just changes everything.

is a crazy interesting hand...straight draws, flush draws. Big pairs are very much harder to improve;

may *start* as the best hand, but gets outdrawn by the first hand quite a bit. Fewer spades left for the board, to give the nut spade flush; can't make a club flush. A paired board is good; one of

give some help to the first hand but NONE to the second. First hand is easy to ditch if the flop is bad; second hand isn't. Lots of hands that would be good for pocket aces in hold'em, are still risky to the second hand in Omaha...players CAN be playing 4 connected, suited cards. (And especially so in hi-lo, altho the advice is, don't play for just the low, or at least not often.)