Ability To Purchase One-Off Credits For Rare Times You Go Over The Monthly Document Signature Limit

I know that the goal is to produce a product for freelancers, etc. and not for huge agencies.

But it would be nice to have a solution for those who may on occassion go over the limit of our plan.

The solution I would suggest is the ability to buy one-off credits that do not expire. ($5 for an extra 10 credits or something like that).

That way you don't have to create an extra tier and you can facilitate people who may occassionally go over their limit.