And LoG has 900k owners alone on steam, that is twice as more as WL2.
Link to source of steamspy.com.
Keep in mind a huge number of those came from a humble bundle.
WL2 had also been very often sold for less then $20USD and given to PoE backers and T:ToN. I alone own 2 digital copies on Steam and GoG and have the rights (not used) for two other digital copies. And do not forget the russians.
That's right. Regional pricing is a nice deal here especially with sales discount.
For example Divinity OS was sold on release with steam summer sale discount for ~15 usd to russians and CIS.
Wasteland 2 - ~ $17, PoE ChE ~ $20 (funny, backed it for $50 but payment was not processed by amazon), Serpent in the Staglands ~ $8, DA:I - DDE ~ $33.
So yeah, russian buyers can push sale numbers (and that might be good to stay on the charts or something) with less money per number going to the devs.