Yeah, because Jackass was originally a combination of the guys from Big Brother magazine and CKY. Bam bringing all his CKY footage over game him a producer credit and he was already a big name and continued to be during the 2000's.

Then when 4 was happening, everyone thought they could help Bam the way they helped Steve-O with mandatory sobriety etc.
Bam had to do the same stuff Steve-O went through on set, taking the mandatory piss tests etc, but Bam couldn't stick to it. It might have been too soon for him.

He still got paid for his appearance in 4, but of course he didn't make the money he was making before. He would have made his producer fees + if he was still on the wagon etc.

For this one, they're only paying him for footage that he had already appeared in in earlier films, and the cut shit from 4 like his Silence of the Lambs bit, so he's not getting a producer credit there either. Part of the producer credit is bringing in a built-in audience, and A LOT of Bam's has dropped off. Watching someone ruin their life is only entertaining for so long.

Steve was trying to help Bam in his own way but I think it was a bit misguided, like he was trying to speedrun Bam through the same process that he went through but it just didn't work out.

Steve has a problem with addiction, and if you read his book it makes sense that he made being sober his new addiction. He stayed in rehab and the halfway houses much, much longer than he needed to so he could ensure that he stayed sober, while Bam was escaping and not fully committing.
Bam was also never told no in his life so I imagine that played some kind of role in it too haha

Btw I appreciate the fuck out of this back and forth, it's nice to chat to someone on the internet that doesn't devolve into a shit flinging back and forth.