As evidence of this, Google does allow donations if the publisher is a 501(c)(3) (see https://support.google.com/faqs/answer/75724?hl=en).
There has to be a better way to handle these sorts of things.
Were they even notified beforehand?
If this is really an attempt at preventing garbage apps from spamming or tricking users, this is both overly broad (many false positives) and badly targeted (many false negatives). Why is it that iOS doesn't have this policy, and has significantly fewer garbage apps?
Maybe if Google were to allow third party app stores, folks could choose the one that fits their ability to evaluate the sophistication of apps themselves. For example, some folks might want to pay for extra security checks on the apps they use, while others want to install anything and everything under the sun.
Oh right, it's because Google wants me to have some kind of "pro" app that is effectively a license, that they can get their 30% cut of.
They don't give a damn about fraud via this method. They want their money.
All in all, that whole "break-up" argument is just political white-knighting by wanna-be elites (ie. Warren & co).
As for continuing being GAFA advocate (while still thinking they should be compelled to open up "Stores" to competition), vertical integration provides enough economy of scale to achieve ever greater complex things. Also, 1) you can't just "break-up" any GAFA. They're just gonna move out of State and be welcomed somewhere else, and 2) what you're asking put Government in a very awkward position as setting up both enough regulations to block new players, but also blocking player to achieve a certain size. Finally, this argument is getting awfully close to the "broken window" fallacy. You can't just "create competition" out of thin air.
Amazon/Facebook is a different problem. Amazon is colliding with the old retail chain and weakening their power in DC (Amazon is not doing anything more that has been done in brick and mortar stores ~forever). As for Facebook, it is threatening Governments themselves (privacy is just just a convenient red-herring).
I'm pretty sure they just want their cut.