That’s regionally specific then, because they sure as hell don’t do that where i live (EU member). They have to compare with non-sale price within a month or something, so it’s complete bullshit here because they artificially inflate prices prior to black Friday “sales”.
Actually I just checked GoG without going through a VPN (from work) and I see the same “Lowest price in the last 30 days before discount” information, so maybe GoG just does it for all of Europe or maybe even always.
In other words, I don’t think is going via na IP in that specific country that’s doing it.