If you ask a question like "Wouldn't you want to be on the right platform?", people will answer the question.

I don't know the tone of voice you were going for with the text, but it stirs ugly emotions in me.

You should remove "Why can I only sign in with Twitter?" as the text following it ("What is the Twitter integration?") is much more informative.

The site looks great though and it's an interesting idea - congratulations on shipping