Professional author here. It's a major, eye-rolling turn-off to see the grammar and punctuation errors, and to be honest, the breezy response is also a turn-off and screams amateurish effort.

If you are posting this on HN, accepting users, and (presumably) taking payments, then you have already publicly launched, and you should have done this already.

I understand that it's a side project, but if you want to have people take your business seriously -- and a business marketing to writers, of all people -- then you've got to make sure your homepage copy is beyond reproach.