Politically motivated refusal of service by Amazon or other Silicon Valley firms is at least an order of magnitude more likely than any coup by the US military, much less a Trumpist one.
Meanwhile, this political shutdown is pure theory, a straw man floated to distract us from the violence that seethes on the platforms used to organize a fascist overthrow of the government.
But even if we take your probability assessment, the damage times the probability places a violent military coup as a HUGE problem compared to Amazon stopping business with someone.
I didn't predict an attack on the Capitol, but it didn't really surprise me, either.
I speak as a conservative who is aggressively anti-Trump but believes many of his voters would not condone what happened at the Capitol.
YouGov speculates in their presentation of the data they gathered that perhaps more Republicans approved because they saw the actions as basically peaceful:
https://today.yougov.com/topics/politics/articles-reports/20...
That belief strikes me as crazy, but if they genuinely didn't think there was violence going on, hard to read it as being okay with violence.