Sometimes, when making small villages with surrounding buildings, the "normal" city services doesn't have large enough radius, which isn't always easily fixed, thus "invisible" city services.

They have large radii (2000) and accumulation (250), take care of way more than they should, and use no resources, human or other.

They are cheats, in the way that they cover a way too large area, and take care of way too much, at no cost, human or financial. But, they are cheats that in some cases, I feel, are necessary, if you build all 81 tiles, and go for rural feel. I mean, you can't have medical clinics, police, fire, schools and what not for every square meter of the map.

Anyway, they have their use, and it's your game, you decide how you want to play it.

The Metro stations are NOT cheats. They are the default station with it's numbers, just lowered to different depths.

If you want to do stuff like this yourself, it's very easy. Open the Asset Editor, Load the building you want to modify. Set the scale to 0.001, which makes whatever's there to tiny to see. Then open it and do any changes you might want to the numbers. If you want to share it you do it from Content Manager, Assets. After it's shared, move the local file (C:/Users/...you.../AppData/Local/Colossal Order\Cities_Skylines\Addons\Assets) to another folder for safe keeping and subscribe to it from the Workshop. That is the one you need to do changes to, never the local one that you keep for safe keeping, but update that one every time you do a change.