Yeah, a few developers do that, the rest of the developers seem to be okay with getting the full price for their games within that sale while their customers get a good deal.
But these developers aren't the customers, so again: wrong thread title.
The headline is more alluding to the fact that there is still no shopping cart. Which means if you want to splurge you have to go through the purchase process multiple times, which can be upsetting.
If you demand respect or gratitude for your volunteer work, you're doing volunteering wrong.