I started using cheapo readers about 10 years ago for close work. For flying and driving I had stick-on reader lenses on my non prescription Ray-Bans. These worked quite well, except I had to take them off for landing... it might not matter to nosewheel pilots, but the biplanes I fly are completely blind straight ahead in a 3 point attitude, so flaring and landing is all about downward peripheral vision, right where the reading lenses were.
But then I started needing correction for distance vision, but my case is less common. I'm farsighted... which means I can use cheap (but weaker) readers for distance, and while they're not quite strong enough for optimum closeup, they're adequate in most cases. Bifocals or progressives might be nice, but what I have now only costs a few dollars, not hundreds.
Actually my prescription is different side to side, so I buy two pairs of the readers, different strengths, and swap the lenses. By using round lenses that can be swapped side to side I get two usable pairs.