I don't have it installed, so I can't comment if it requires constant babysitting, but looks pretty okay to me -- it has no AUR-only dependencies (++), one extra shell script (--), popular (++ given enough eyeballs...). Should be fairly easy to review, anything fishy should be fairly visible in git diff. If I needed it I would be using this PKGBUILD. It's a net gain that it exists there, someone else done most of the work for me.

> Now, someone could argue that the Spotify app isn't important, but there's a reason it has 268 votes. A better solution would be having packages like spotify in their own repo, and a separate, you-better-verify repo for the rest.

I mean yeah, but everything is trade off of volunteer + user attention. There is no trusted user™ who uses spotify, so it's not in official packages. So you as user need to maintain it yourself or rely on AUR and verify.