I do feel VidiCable is safe on Amazon. But I still am a bit cautious.
I downloaded season 2 of a show that consisted of 120 episodes.
Waited a week, nothing from Amazon, so I then went back and got season 3, which also consisted of 120 episodes, and again, nothing from Amazon.
So, until I get a notice, using VidiCable that's my go-to now for Amazon. And like I said, their support is very responsive to updates or hotfixes that they call them, and the series all work on VidiCable.
Some series with streamfab won't even work right. And I expect that to spread to most, if not all, other series,
Now, this Thursday or Friday, you MIGHT see an update for that issue with Amazon via StreamFab, notice I say might.