These crazy outdated licenses that let you print as many magazines or books you want forever, for a one-time price. But if your hobby is making apps, then suddenly the same font will cost you 50 times more - for a single year.
I guess these font sellers imagine there’s still some app boom - a Klondike rush with developers bathing in dollars. Maybe if their licenses were more realistic, piracy would be less of a problem.
So it's de facto "free unlimited trial, free for personal use, pay for business if you have a soul and shame"
I researched it for Russia recently and apparently the law is much stricter about fonts here than in the US. Both the character shapes and the "code" are copyrightable so you ain't getting away with converting it into a different format either. Companies did get sued over this and did have to pay millions of rubles in fines and licensing fees for their past usage. Not sure about individuals but I wouldn't try my luck with any non-free fonts made by Russian designers.
Depends if your home country cares about Russian civil court or not.