Yes, one editor = one person who can edit files in the team. If you are the only designer on the team, you would pay for one editor. If you have three designers in the team for example, you will need to pay for three editors: 3 * $12 = $36. Editor is a member of the team who can edit at least something: they can have access to editing of only one file, one project in the team, or editing all files in the whole team.

Глеб, можно объединить дизайнеров, имеющих профессиональную лицензию в команду и не платить снова за каждого?