The OP wasn't about why Punk's entry into the UFC will or will not be successful. It opined that he is creating the exact environment for daily-grinding UFC fighters that he complained about and eventually quit over in WWE. I never thought I'd follow "rasslin'" but my kid loves it and we watch it together. He prefers MMA (good boy!). He was a huge Punk fan so I followed it with him.
Yes, Punk has tons of dough.
Yes, he will bring in $$ to the UFC and indirectly to other fighters.
Yes, the UFC and Punk have every right to do this.
Yes, the OP was exactly correct. He is doing to others as others did to him. Brock and co were taking PPV and Wrestlemania main events from daily RAW regulars.
Yes, he bitched and moaned about it publicly and quit at least partially because of it.
And Yes, the first real, experienced fighter he faces will beat the shit out of him.