Not about multiplying spawn points, but about adding a bit of "fuzziness" in where players are going to appear.
Goal is to prevent spawn prediction and camping.
The concept could be extended to "make spawn areas", but then I suppose it would either require a trick or modify the map making process.
I think this idea has already been brought by Falkland (where's he gone BTW ?)
Didn't Sago modified the way the spawnpoints worked in some version of OAX?