What is the value of a subscription?
Subscriptions to members certainly have use.
I subscribe to people in whose work I am interested, who are sometimes also friends. That means I get emails that let me know what they have done, even if I miss seeing them in the lists of projects and topics.
Those subscriptions have value to me, as a subscriber, because they make my life easier.
However, I have noticed that quite a number of people use subscriptions as a form of currency or reward. "If you do this thing for me, I will subscribe to you".
How much value do you place on subscriptions?
Do you measure your own worth as a member by the number of subscriptions you have?
Do you decide how much to respect somebody else by the number of subscribers they have?
What if you were only allowed to subscribe to one person for every project you had published?