"I wanted to offer the service to people that might not be able to afford it, and not have them punished by having fewer features." That's neat, why don't cons

"I wanted to offer the service to people that might not be able to afford it, and not have them punished by having fewer features." That's neat, why don't consider some kind of sponsorship program? A user that can pay, can sponsor one or two more users who can't, that would be nice :)