This restriction is there just for the last 2 hours. You could do 5 analysis without any account before. The reason is that I got a huge traffic from HackerNews and the service was not prepared for such a big load and were (are) there many technical issues. I know, it is my bad but I really did not expect that people will love this service (concept) so much that it will go on #1 page on Hackernews.

Agreed - very uninviting flow.

It would be better to ask for the email in the same page as the first search, or the infinitely better "enter email to save your search".

> Why to sign up? As a registered user you will be able to perform more searches for free. No spam.

Making you sign up is not unreasonable. But I find this text annoying. Yes I can perform "more" searches for free if I sign up, meaning more than zero.