Trump can profit either way, the key is the insider knowledge to bet for or against them. Admin insiders financially engineered where they profited from refunds.

Any vote towards what the insider information pointed to was a vote 'for' the admin as they had financially engineered their winnings based on that. And meanwhile Trump immediately turned to a new tariff structure. The vote they gave was the strongest vote in favor of the admin insiders they could have given, and meanwhile didn't actually stop Trump from continuing on with the scheme.