I did, however, hear from a Dasher who was more than happy to clue me in on the policy[0]. From now on, I no longer tip inside the app and let the Dasher know I'll be tipping them in cash at the door. It's a pain for me, but I feel better knowing 100% of my tip actually went to them like it was supposed to.
So right now I'm making DD pay as much as possible for each delivery to me, which is the point where I at least retain a bit of self-respect. My hope is this gets "corrected" before I have to quit the service, but if that becomes the only real choice it's what I'll do.
As far as the tipping, I do need to get an envelope of small bills going to meet my own standards there, but at least I haven't hurt the Dashers worse. The moment the 20% tip would be enough to raise their payout (DD guarantees a minimum of $1 from their own pockets, so that's $4.51+) I've tipped it regardless of the offset. They're victims in this.
But regardless of any perceived hypocrisy you may have on my part, DD is a bad actor here. Gig economy has always had the strong potential to exploit the "contractors," but this actualizes that potential in a big way. Even the sub-min-wage base+tips model for service employees isn't this egregious.
(By the way, how long before we can tip people on WhatsApp?)
You can apply basically this argument to similar things which the government doesn't do and people typically don't support (like running casinos or selling drugs), though.
But I'm pissed. I've been a heavy DD customer for years and I'm an excellent tipper. Apparently I've been offsetting DD's costs for quite awhile now thinking "100% goes to Dasher." Bad enough that I have to tip in advance of the service--Uber Eats does this right--but they've been stealing those tips the whole time on top of their "service charge" and "delivery fee". I'd love to see them burn.
It doesn't take a class action--last I saw comparative stats they were only doing well in the Bay Area, San Jose specifically, and were rock bottom of the market share elsewhere. We probably just need one educated market to trash this strategy.