ENDER LILIES: Quietus of the Knights is currently 25% off from its $25 list price on the eShop (which, for as much as some people like to complain that there aren't enough/good sales, is the only marketplace that currently has it on sale as of this post), and with the gold coins I had in my a wallet, I was able to get it for ~$10.
Sony doesn't offer jack, and while Microsoft's system is cool, it isn't as passive a thing as getting money for games I was going to buy anyway. Yes, it expiring is lame, but I guess since I'm mostly digital on the Switch, I constantly accrue a decent sum of coins in a relatively short period of time.