Guys, many greets!
I would say almoust for sure that flappy.stablehash.com is a scam pool. Its down for 2 or 3 days already. I had there around 900 000 FLAPs and i couldn't withdraw it coz it didnt work. The owner didnt respond to my messages in the pool messaging service and here on bitcointalk.
Well, its for you to decide, but thats what happend to me.