Do Bengals mostly insist on being the "ONLY" pet in the house?

I read this post yesterday afternoon. Later, I was looking at the pet column in the newspaper. (I know, I have SEVEN already, why do I do this??) I saw this ad:

CAT, rare exotic breed, bangle, nice colors FREE [then the phone number]

Hmm. So I called. It is female, about 6 months old, found wandering, no collar. "Found Cat" signs were posted in the area, no response. So now she is up for adoption. She is with "Feline Rescue of Cape Anne." She MUST be the one and only pet in the hosuehold. AND -

This is what really got me. They will not let her go until she is spayed and has her shots; they see no point in breeding her as they don't have any papers for her. There will be a $300 donation to adopt her.