For the comments regarding D2D having had permission to upload to Amazon as an aggregator, I may be misremembering, but they did not have an agreement and were merely collecting under one publisher account just like any of us could do. Only the reality was they were an aggregator, not a publisher, and that was why Amazon closed their account.
Smashwords only allowed a select number of authors, hand picked, to use Smashwords' Amazon account and were acting more like a publisher than an aggregator for those authors on the Amazon platform. I have yet to hear of Smashwords losing that account, but I don't follow closely and may be misremembering.
You're probably right.