If the reward money were increased to $1m - his life would become a living hell. Coyotes & drug smugglers making plea deals for information.
We should assume he’s getting help from his family and anti-US Mexican authorities. Disguises and favors will last only so long....imagine he has no money and any funds from the US are being monitored.
We just have to be patient and wait for his capture - there may even be political stuff behind the delays.
Patience is all anyone has at this point.