We decided that because we moved them to bases (you can take them off at any point) people who've had them weren't getting any special benefit other than being able to go into the underground whenever they want (put on zombie skin, go underground, take off zombie skin). The old strains were getting down to 100~ active users having each one which just isn't fun for anyone.

And skitters was weird, he's actually been located above ground the entire time, is the one constantly fighting for human zombie equalness, and yet didn't let humans in his store? It was a weird bit of lore we never really worked out after fleshing out (hah) his character and didn't make sense.

Locking! ^_^