I agree. It's a good idea to add .io to the logo.

There is a 30-day free trial for paid plans (unlimited users and projects). Do you need a longer trial period?

As for per user pricing, a lot of vendors charge a much higher per user fee (four or five times as much), and they greatly lower their pricing as the number of users increase. I think charging a flat low fee is better because you pay a lot less when you are first starting out. There is also an annual payment option, which gives you two months free.