As I said, you should at least allow creators to accept the money directly given to them via coins. If someone pays for $10 worth of coins, any of those coins tipped, the creator should be able to collect, even if its just a few cents. You can still take the 15% off as had been indicated before. For coins earned through advertisement and the ad-revenue, creators I guess will just have to wait until they reach the $25. This is a very technical aspect, requiring distinctive changes to the way the site works, so this isn't easy to do per-say. But I say again, I don't like the idea of such a hidden, easy to miss limit being placed, not just on creators but specifically on tippers themselves, who may never realize their money can't be used unless they're directly told so. I think that is completely unfair.
I said it in the earlier post but if I had used Tapas to buy coins an then found out my money wasn't actually being used to support the creators, just being held indefinitely, I would've seriously demanded my money back. I would've demanded you give me every last cent so that I could properly give the money to the creator. At risk of repeating myself, if that $25 limit is necessary, than I feel both creators and readers have a right to easily know about it.Don't have this "limit" set on some obscure part of the site that nobody would check. Have it somewhere it won't be easy to miss.