Since I've been asked, Glenda is in a transdimensional nexus realm. I figured she'd be avoiding lockdown in her own way. And since the entry ways are hidden in phone booths, they get service.
Witch magic turns the user old and hag-like with overuse, which we've seen in the past... so that's why she needs payment in the form of fat, young children. She's a witch, like in the story books, so she's not not a monster even though she's attractive with a huge rack.
