What are you talking about? The initial reaction of most of those guys was a complete forfeiture of their fighting structure. Some of them dropped like they'd been KO'd, one guy called timeout when he could barely see, one guy walks away like the fight is over.
These aren't the "I've decided not to continue" or the ref calling the fight. The initial reaction by these fighters is "I don't know what's going on but I can't see".
An eye poke isn't just pain compliance. It's sensory deprivation.
Look at the pokes again.
1:10 into the video, his vision is clearly impaired and you can tell he's just holding his arms up out of habit, there's no way he's stopping a hook with those.
3:01 basically looks like a KO
4:58 another KO
5:30 he closes his eyes in the middle of the combo, 5:37 he walks away from the exchange
6:00 he walks away and shows his back, if the ref didn't stop it he would have been attacked from behind
Yeah, a lot of these fighters come back. But if the poker didn't have the ref stopping them, most of them would have been destroyed from behind by a punch to the back of the head or a sleeper hold.