It doesn’t seem very unclear - the president made up a policy it isn’t possible to comply with, since there is no way to actually pay the massive bribe, in addition to probably being illegal, but nonetheless CBP may start refusing entry to people in hours.
Like many cleptocrats, DJT seems to think that money received by the federal government is somehow his. However I don't think bribe is the appropriate term, it's more of a shakedown.
To the state coffers where it is money laundered to friends of the political class via favored private enterprises that win contracts for things like building border walls, keeping databases on US citizens, or running detention facilities.