Hello! Good question!
In my opinion is I think we need at least 5 members that have to be managed, but not only, and not your users need to have those at least 3 for at least one member.
To you had profits of the first, second, third, fourth, fifth and sixth levels below must be BTL, because if you EA2 you will have income only from the first generation.
I hope I have at least a little help
