Well, the cartel will want to be the first in that line [to mine a modified protocol].
There is no cartel on the Red Button hard forked protocol. Anyone has equal access to the ability to mine. The fact that someone
was a cartel previously does not grant any vested status in the future. Deepbit, for example, has no greater ability to show up today and be a mining cartel than you or I do.
Come on, you know that "the cartel" there means "the cartel of old-chain miners who want to force a change in the block schedule". It is not "a cartel of rebel-chain miners".