If node operators are not enforcing the fork, then it is in every miner’s immediate financial interest to assign to themselves the escrow coin. For this reason, I predict that the coin will be swept (cold, hard incentives).

One could make the argument that miners’ long term interests are better served by keeping the drivechain going (that is, by safeguarding the escrow). The question is whether miners (mining pools, specifically) believe that it is in sufficient quantity to ignore defector’s blocks.

Do miners have the collective will to keep each other’s hands out of the cookie jar?