Yeah, from what I've heard, the fins make it extremely hard for the fish to swim. It's like adding on weights, which bettas DO NOT need xD They've already got enough to lug around as it is, and they've GOT to reach the surface. It looks good, but seems pretty cruel. It'd be better on a fish that doesn't need to surface all the time.
Edit: Also, you can see where some of the fish have nipped their own fins... Yikes. Pectorals are pretty important for bettas, as it's their main way of movement. If they're so cumbersome that the fish are actually nipping them, they have to be uncomfortable.