They literally ruled that interested parties can pay a gratituity to officials and politicians, so long as the official act they're paying for occurs before payment.

That's not some pessimistic reading of the case. It's not subtle at all in it's intention to legalize bribery at the federal level.

The case at hand was a mayor that gave a contract to a waste disposal company worth about a million dollars overtly in exchange for them paying him $15,000 after the contract was awarded.

He was prosecuted for official corruption and bribery, and the Supreme Court threw it out because he was paid after the corrupt act and not before.