A responsible ftp wouldn't be tempted by this.

Same as every part of the game, do it if ya wanna.

I've seen one of those at least twice (maybe 3 times) already and haven't been tempted. I spend all my FTP crystals on energy refreshes to farm. Gotta beef up my roster for raiding.

Of course once I get a good roster and decide I'd like one of those, I'll go a month without one popping up.