Is exchanging of merits between alternative accounts a problem? What can happen with less than 50 merits?

• No one will risk with it because it will increase the probability of linking accounts.
• Exchange of a few merits will not make a difference in the account.
• Unless the case includes hundreds of merits or with merit source it is a good thing because it will mean more high-quality posts.

What is the criterion that making it a merit farm exchange? It is less than 50 and it is not enough to rankup more than member account.