Both are decent websites, and both could improve.
I honestly thought PrizeRebel was the best site around, but you'd think they had a list of what offers they've added recently .. seems unorganized. Now I can't do any offers that were added on 13-15th because they'll ban the account if I do any offers I'd done previously. I'm glad now that Gaming Lagoon sends out an email on approval/disapproval incase this issue hits them in the future.
I still prefer MyFaveFreebies to either though, she keeps an ongoing list of added offers, amazing & great support, easy offers (insert email or zip), AND you can get Paypal / Amazon GCs to get what you want.