haha i mean if we're talking about a situation where someone has bad credit, or a criminal history or whatever how many people with that background will have the funds to pay upfront (or want to)?

Having subleased to a legitimate person before, it's already annoying/stressful enough to be a sublandlord since you are taking on a lot of credit risk as is. If I'm in a position where I'm going to shadily rent out my below market apartment I'm not going to rent it out to someone that a normal landlord otherwise wouldn't pick.

Plenty of people have actual friends and relatives with those backgrounds.