i always end up taking the unwanted bettas. Theo'd been there a week or more, then i found out he was blind. didn't take him back, because i knew he'd be happier with me. and, he was. he strutted his stuff, even if he couldn't see who he was strutting for. i never saw him clamped, EVER. he always had his fins held proudly. even when he rested, he'd rest on his ventrils, with his fins spread proudly.
even the betta in my avatar, would have sat there. he's in no kinda trouble, but he proves how much i adore the 'unwanted' bettas. <3