There is a rule against it. The forum itself states:
It is not allowed for merit sources to sell their merit.
See above. It is stated by the forum on a need to know basis.
Alright, so if I'm understanding what you're saying correctly, this is shown on the page to Merit Sources, and not to any other users?
If so, does this imply that all non-merit sources are allowed to sell their merit? That's still kinda concerning.
Also, "sell" is sketchy. I presume you can't directly pay people for goods and services. But, can you hold competitions where you give out merit to winners or users meeting some criteria? Can you frequently give merit to users when they help you in particular, rather than help other users, making it some sort of tacit assistance for merit?