To use business lingo, blocking Linux support is just leaving money on the table.
And not even a little.
The current HW survery says that about 1.9% of Steam users are on Linux. According to 3rd party sources, there’s on the order of 120M to 130M people who used Steam this year. Extrapolating the HW survey, that’s about 2.5M Linux on Linux users.
Fortnite is leaving money from ~2.5M possible customers on the table because of stupid ideology.