If everyone else has the same option (the trillionfold copying), Yu’el is no longer favored.
If everyone performs the copying strategy, then after the lottery and the copying but before the merge, the majority of all agents (summed over all the worlds) have won the lottery. So if copy-merge works at all, Yu’el is still favored, and so is everyone else.
If everyone performs the copying strategy, then after the lottery and the copying but before the merge, the majority of all agents (summed over all the worlds) have won the lottery. So if copy-merge works at all, Yu’el is still favored, and so is everyone else.