Universities have been running Linux since the very early versions. Slackware was pretty common back in the 90s and 2000s and universities had labs full of them not least because there weren’t really laptops so they had to have enough machines for all the students. Universities have been heavily involved in the development of unix from its inception and a lot of the tools were initially written by university professors.
Probably the only way they will get taxation money out of the tech giants given all the shady things they do to transfer the profits out of countries to evade taxes. VAT at least is a lot more obvious and harder to avoid although I don’t put it past them to start doing even shadier things.