My workflow is:
-Musicbrainz Picard to get all the information from an online database
-clean up the tags with kid3 (Linux), rename files and folders
-use mp3gain to “normalize” all songs to the same level, so I don’t have to constantly adjust the volume.

I can’t find any info about a blanket ban on idle/clicker games, and quite frankly, I don’t see why valve would ban them.

For them, it’s free money:

1. the developer has to pay a flat fee for the game to appear on the storefront
2. the developer has to pay an additional fee to enable community items
3. both the developer as well as valve receive a percentage cut of the sale price in the community marketplace

my guess is that a lot of people let the game idle in the background to farm items, that’s why it’s so “popular”. It’s not “active players”, it’s just a large number of people farming items in the hopes to get one they can sell for a larger sum.
Afaik it has been in the top charts for over a year.

Banana (which I’ve never even heard of and I have no clue why it’s that popular).

It’s an idle/clicker game that drops steam items that can, theoretically, be sold for money. I can’t recommend it.