I have found a TON of high res music on both Tidal and Amazon! Not sure what genre you listen to, but there is quite a bit. ALSO, you can often listen to the same album in regular or high res and compare the differences. If you have a good system, it's NOT a subtle difference. Play Toto's "Africa" in HR...you will be blown away! Or just about any song on Queen's "Night at the Opera" (my personal favorite is "The Prophet's Song"). Or Led Zeppelin's "Moby D-ick" (best drum solo EVER, fight me if you disagree!). And, on Amazon at least, if a song's not in "HD" it's usually in at least CD quality, which still sounds pretty damn good! Some audiophiles might split hairs over which service sounds best...but the reality is that ALL of these services that support high-resolution music sounds pretty damn good with the right equipment! If price is your objection, though, Amazon's $13/mo price tag is the most affordable (that price is for Prime members, non-Prime members pay $2/mo more). And that's only $3 more than the standard price for Spotify or any of the other lossy streaming services.
Edit: Why is it replacing "D-I-C-K" with "lord helmet"? Some kind of anti-profanity filter?