XF 1.5 Signatures Question

[swish]

Is there anyway to make signatures something that is only available to members who have a certain amount of participation, say 10 posts?

And is there any plugin that would allow you to make signatures a premium feature, say charge $1.00 to add your signature?

 

[Paul B]

Remove the "Edit signature" permission for the Registered user group and set up a promotion after 10 posts to a user group which has it allowed.
https://xenforo.com/help/user-group-promotions/

If you want to charge for it, set up a user upgrade.
https://xenforo.com/help/user-upgrades/