In some cases, they are paid positions, in others a stipend is issued, again the construct varies considerably but I have never known of any instance where anyone does it because it's such a great income earner, they never are, because the residents goal is to pay as little as possible to get as much as possible, a situation naturally antigen to profits as you speak. 

They threaten me with legal means and bring it the attention to local anti-gen support groups

The very premise is antigen to PASSIVE mailers.