0: https://www.androidheadlines.com/2016/06/amazon-ceo-explains...
EDIT: Sidebar, but the whole "Private business discussions should stay private" comment in your link... Bezos knows how appalled we'd all be if we saw the way these companies acted behind closed doors. There's a reason the MADA is confidential too.
That has nothing to do with Prime Video on Android (i.e. in Google Play) not supporting Google Cast. That's an intentional decision by Amazon. To enable Chromecast in their iOS/GPlay apps, Amazon just needs to register the app (https://developers.google.com/cast/docs/registration), not agree to the MADA on other devices.
Amazon might as well ban all Microsoft products because MS doesn't allow Amazon to replace Cortana with Alexa on all sold-thru-Amazon PCs.
When Amazon was selling other people's products, there were no problems. Now they have their own, and any time they push those in favor of a competing option that they used to sell without any qualms they're going to be in trouble.
Apple has this same problem, but it's mostly limited to accessories. If they stopped selling Belkin and Beats and LaCie in their stores, we'd hear a similar clamor and people would be justified in being pissed off.
By that logic, one could I think make an argument that Apple are being jerks by not carrying Logitech products in their physical or online stores. Considering Logitech (no affiliation) has without exception made the best mice for OS X for over 15 years, Apple offering their overdesigned and underdelivered 'mice' and excluding Logitech is a protectionist move.
The exact terms that Google uses to block Amazon devices from using Chromecast and other Google Apps is the same one they're expected to face a new recordbreaking fine for in the EU (larger than the last one) by the end the year.
I mean, I guess I could be sold on the statement that it's two behemoths throwing around their leverage to try and force each other to play ball.
One of those apps is Google Play Books. So in order for Google to permit them to support Chromecast, Amazon would've had to agree to pre-install their competitor's ebook store on every single Kindle.
See the issue?
Hell, the whole Play Store is basically a direct competitor to Amazon's multimedia offerings. While Amazon's own behavior is scummy, it's also unsurprising given the situation.
It's simply a coordination problem.
And being required to preload Google Play Books, a direct competitor to Amazon's Kindle platform, is similarly fundamentally unacceptable to Amazon. These two companies are completely unable to come to terms on this because their requirements are so blatantly opposed to each others' businesses.
As these mega-conglomerates start selling everything under the sun service-wise in lock-in ecosystems, these sorts of clashes are likely to increase in impact and number.
Being upset about Amazon's response here would be like throwing a fit you couldn't buy a charger for your Chromebook at an Apple Store, it just doesn't make any sense.