"I want to sell a membership to clients. I will “own” the software but want to let members sign in to their account. Can I do this with a plugin that I buy? I am a bit confused about using it to launch a new product that I will sell to members.
yes you can but:
- you have to purchase individual license for each individual end product
- if you charge to client to get access to the application (part of the website/platform) then you have to purchase extended license.