I currently have a Tier 1 lifetime plan purchased in May 2025, and I’m considering upgrading.
When you refer to ‘seats,’ I assume this means user accounts. Since Tier 1 includes 1 seat and Tier 2/3 offer unlimited seats, does this mean I can add multiple users to my account? I have a team of 3–4 people and want to understand what level of access they would have.

Will additional users be able to see my existing work, or does it stay private unless I choose to share it? Can I give access to specific projects while keeping others private?
If I add 1–3 team members, will their work remain private unless shared, or will they automatically have access to all of my projects?

I’d appreciate clarification on how user access and permissions work.
Thank you in advance