A lot of artists who were on FA also had a dA account. Some decided to keep their FA's up, but not be active anymore. Others closed down their account.
So far my experience with Weasyl has been a good one, but I do notice it's a bit harder to get noticed on there than on, say FA or dA (for me at least, but that could just be my personal experience, that and my Weasyl account is pretty young compared to me dA and FA accounts).