Question about price drop of Larry Wet Dreams Dry Twice - potential giveaway somewhere?

Hello there. I know reseller websites are not popular among everyone, and I understand the reasons. I do not intend to convince anyone. I just have a price-related question. I noticed, that Wet Dreams Dry Twice became surprisingly cheap on g2a.

I know Wet Dreams Dry Twice was bundled in Humblebundle once, recently. But even months later, the price was still over 10€. Suddenly, and afaik only on g2a, sellers started to offer it for 2x or 3x less the previous price.

A friend was like: Why not. And bought one, and even got the "Save the World Edition" luckily. (Not sure if it was a mistake or not).

But that aside, anyone knows if there is/was some kind of giveaway? Maybe some hidden giveaway, like Intel Master Gaming now and then does with their Master Codes for US citizens etc.? Anyone knows anything related to this sudden price drop? Could it really be jsut because of the Humble Bundle a few months ago? I kind of wonder how the "Save the World" Edition was accidently mixed in this, then. Are there even already cheap keys for this edition? I personally did not hear about that.