You made it sound like they had 100+ full time employees specifically („payroll”) but it could also mean they paid €1 bounties to 101 people. I know they subcontracted Proton to CodeWeavers (~50 people) who have been working on Wine for ~20 years by then.
these were external developers. https://gigazine.net/gsc_news/en/20221219-steam-valve-support-proton-mesa
You made it sound like they had 100+ full time employees specifically („payroll”) but it could also mean they paid €1 bounties to 101 people. I know they subcontracted Proton to CodeWeavers (~50 people) who have been working on Wine for ~20 years by then.