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Font designers publish poor quality fonts to promote their products? That isn't supposed to work.
You’re underestimating how much work and skill it takes to make a good font, even for a great designer, so type foundries like to lock good fonts up behind rent-seeking license agreements.
Rent-seeking would be if Google demanded money from a font designer to let their fonts be "compatible" with Chrome. I.e. Pay me or I'll make sure your product doesn't work with my product. App stores is a common example; pay Apple or they'll make sure your software doesn't run on the iPhone.