I wouldn't. A founder is supposed to be someone you share your vision with, bring talented people on board by all means and certainly pay them but don't make them founders! Keep control of your company.

I would but how you you structure this is something you think about. What value addition would you provide on top of LinkedIn ? Some things to think about but can see a use for such a service.

I'm thinking about something like assembly but with some changes.

A dating app for finding founders based on personal and professional qualifications and match? I guess it has been tried before but why not again

I'm working on an assembly like product but a little different. if your interested feel free to email me(in my profile)