It's a little complicated to explain, but you will almost always be forced to make additional wagers to withdraw your winnings relative to other sites. On DingDingDing, however, you can only withdraw 150 SC of the 300 SC you have.
For example, if you deposit $300, then win three 50 SC blackjack hands and then lose three 50 SC blackjack hands, then you have satisfied the requirement and can withdraw your 300 SC. Most social casinos have a 1x playthrough requirement. Furthermore, there are some oddities with their playthrough system. I also recently had an issue with a redemption where I had to wait a month to get my funds (thankfully, in the end, I did get it). Typically, they process withdrawals about once a week, and you cannot have multiple pending at the same time, which is slightly awkward. They are slower than the average social casino with regard to redemptions. There are things I wish they did better, of course. On top of that, their deposit bonuses are generous, and they add new slots and table games to their site constantly. There are multiple ways to convert gold coins ('GC') into sweepstakes coins ('SC') between things like their progress bonuses, their 'Switcharoo!' game, the farm pet minigame, and the bingo minigame. There are a lot of things that DingDingDing does right- I like the mechanisms they have in place to reward frequent play. Good, but a little rough around the edges