I pay for a plus account. I would like to allow multiple people on the free account plan to edit the base I created. I want them to be able to add attachments, data, and info. To edit the base that I created as a plus subscriber, do the free subscribers need to pay for the plus plan?
Free users on a plus workspace cannot edit existing records. They can create new records using a form. Those new records can have attachments, data, and other info. There are also creative solutions update existing records using data from a form and automations.
If you want these users to be able to directly edit records, you (as the owner of the workspace) would need to pay for them–they would not pay for themselves.