With 200 players metal would have to be cut back so much every player would be getting basically nothing. The best strategy would be to push coms and use the starting metal to upgrade them a bit, probably. Also everyone should drop their facs around the same location so a few backline coms can canibalize them and make some units.
(one might argue that factory cannibalism would already make sense in the current 32v32 lobsterpots, no team needs 32 factories. But off course everyone wants to have their own)