[hugogameiro]

From https://masto.host/pricing/ - Under the Galaxy plan 90 EUR/Month: "2000 Active Users (estimated)"

Also, in the 'about the plans' section of that page, under 'Concurrent Requests' and 'Users and Active Users' you have more details. But one can think of concurrent requests limit as actions occurring simultaneously (eg: 50 people clicking a button at the exact same time). Even on the rare occasions when that happens, the actions are queued and take a couple more seconds to process.