https://www.businessinsider.com/google-exec-nest-owners-shou...
They've been warning us themselves.
Slightly off topic but I did like one of them being so frank about Linux and open source. They worked for a while with the NSA, all they said was "Linux has 100 million lines of code. You have to fooling your self to think we didn't slip in hundreds of backdoors onto that thing". The same can be said of almost any other system though.
I have long suspected that the gaslighting thing of "it is just subconscious coincidence" is just a very neat cover for these things. There might be a slight influence but it is nowhere near as powerful an effect as they would like you to think. With advertising swaying people, they can move a few percent of people a few percent in one direction but it doesn't really target individuals effectively in guaranteeing results. Only as an aggregate.
This is exactly why I hate this dumbass conspiracy theory. You're totally correct, they are both capitalist corporations driven by profit alone. And the fact is that if they were secretly recording us in direct opposition to what they have said on the record it would be an absolute disaster for their bottom line.