See game #118614554 turn 6.
Which is correct, after ther 2021 errata to Patron (http://forum.dominionstrategy.com/index.php?topic=20909.0)
which now reads:
...
When something causes you to reveal this (using the word "reveal") in an Action phase, +1 Coffers.
[emphasis mine]
Ah, I didn't know the new errata. Thank you