Multi-Board guest

[Александра Коноплева]

Dear all, I am a bit lost in the concept of the multi-board guests.

The plan is to get Premium for 2 administrators of the project and invite the rest of the team as guests to one board, which we will be using.

But as far as I understand, guests can see only 1 board for free.

What if they also use Trello for other projects of other companies and will be involved in more then 1 board without me even knowing about that? 
Will I then have to pay for them?

Thanks in advance.

[Daydreamer Mike]

This is on a per-workspace basis so if they are working on other projects in other workspaces, it won't be your project workspace wont be charged.

If this is the model you are working on and you are responsible for the Trello workspace, I would propose that you have a workspace per project