I mean... Righfully so. All those new "gambling" websites (who aren't even regulated as such) are an insider trader's dream.
I do wonder, was Polymarket given a chance to prevent itself from being accessed/used from Spain? They seem to be a-okay with blocking usage from US states that have asked them to cease operation, so I don't see why they would try to actively defy countries that have (legally) asked them to not do business there?