Craig's Twerp is enamored with Craig. Who knows what their relationship was/is like or if there really is one. One might assume Twerp was his insignificant and dispicable cum dump, judging from his handle. It's also possible he is one of those folks who falls in love/lust with criminals who are incarcerated and has an imaginary romance with them sometimes via letters and phone calls. Perhaps he sends Craig "gifts" in exchange for correspondence. Anything is possible.
Walter must have been everywhere gay a lot of the time to know so much about Craig's G4P whoring about. It makes one wonder is Water someone who either bought Craig's services or was turned down by him at some point. He seems very anxious to spread this detailed gossip about Craig.
It is hard to say for sure what Craig did or didn't do to make money. He obviously dealt drugs since he was prosecuted for doing this. If he did a bunch of G4P, so much that it makes Derek's G4P activities pale by comparison, one wonders how it is that there aren't pornographic photos and videos of him all over the internet. He must have been pretty discreet, unlike Derek and some other bodybuilders who've supplemented their incomes playing to schmoes.