Shelter wants to take cat from me and transport her to another shelter??

Is this normal? I have been fostering a cat since the summer and got a text this week that the shelter needs me to decide within the next week if I want to adopt her, otherwise she will be flown to another shelter.

Decision on what I want to do aside - is this normal? It feels like they are pressuring me to adopt her. Why would they take her out of a foster home to live in a shelter elsewhere?

Their explanation was that the other shelter doesn't have enough cats.