The plans are automatically calculated by how many projects you have within Basecamp.
For example, if you have 50 projects in Basecamp then you'll need the Workstack Premium plan.
After 30 days your trial will naturally expire and that's it.
You only need an email address and password to get going. We only need payment details if you decide to signup for a paid plan.
No. Just pay once for all the users.
You can check on our Questions page or contact us, we're happy to answer any questions you have.