I'm in SF for a month and stumbled upon this web site that seems interesting to find co-founders and like minded entrepreneurs to exchange ideas and maybe some early feedback about my upcoming launch startup. I tried to sign up but dropped in the middle and received the follow email:

Hey, I saw that you started to apply for FounderDating yesterday but haven’t finished it yet. Just wanted to reach out and see if there is anything I can help with - I’m on the community team? Happy to answer questions or if you’re set highly recommend taking 3 minutes to finish it up Finish it up and submit here >> Here to help, Kristen

I responded:

Hi Kristen, I don't have a LinkedIn account. This is the reason that I haven't finished.

The answer surprised me. No workaround.

Hi: We do require a LinkedIn account, it's the easiest way for applicants to save time and pull in past experience and education. Would love to see your application, Kristen

Why on earth a company rely so tightly in another company like that. Well, the post gave me a clue.