Welcome to the club buddy  .
My limitation was lift off after I approached customer care but not I don't feel like spending time and energy on freerolls. Stake.com has cut massively the prize amount and brought 5 card omaha in to action for these freerolls (which I am guessing is the reason you wanted to play as a omaha lover).
If you a player who is not playing at least 40% vpip, many will report you which will result in such limitations, such a pathetic rule (I thought it ended with me but lol).

Just a little funny story. Some days ago I tried out that infamous stake engine game called "crystal flip".
I only used play money and the result were pretty interesting. Picked always the same crystal for like 20 times in a row, with losses over losses. Then switch the crystal and instantly the previous pick gets win after win. Switching back and the winning ones also change. The first change of crystal was actually hilarious. After 20 flips picking the middle the highest win was 1.4x, with my crystal in 80% of cases has had the worst multi. Then I change to the left one and instantly the middle crystal get 10x 3 of the next 4 flips, yeah right.  

You wanna tell me that's variance or luck or what not? Sure, the sample size is tiny but this "coincidence" is so strange. And I mean if this is already the case with play money, how much worse is it when you use real money?

Check out the video for yourself, glad I recorded it: https://jumpshare.com/s/EGVHUSGl9eWMNkgrz8TL

Stay away from this one, seriously.