I got given some free money 3 times now. First time I got something like $10, and that just wasn't enough for the swings. 2nd time I tried playing the $5 SnGs - won the first one, but had a bad run of a few bubble finishes (literally having no profitable hands in 2-3 whole SnGs, the cards were that bad), and bust out again. Finally, I had a 200 raked hand requirement on a $200 freebie, and I managed to clear the 200 raked hands mostly on the $0.50/$1 Omaha H/L tables, so I now have a balance on there again.
Because of the lack of % seeing the flop, you have to judge on pot size, and sometimes you find that instead of it being a loose, fairly passive table, fewer players are staying in and playing aggressively, requiring rather different tactics, so this lack of information in the lobby is the reason why I haven't redeposited, and have only used money they've given me for free.