None of what you said has a thing to do with how it would work as a conspiracy. At least bother to get it right. The fix isn't in question. It's possible strategic timing of letting consumers know about the flaw.
Beyond a doubt, Google and Intel knew about this in June, 2017. Intel's CEO is being investigated for possibly selling stock after he knew.
And with the possible bad sides being talked about (hackers gaining access to systems, potential 50% slowdowns, etc.) damn straight it'll spur sales of new CPUs without the flaw.
It still wouldn't work well as a conspiracy, though.
First: companies are often told about security issues well in advance so that they can be disclosed only when a patch is ready, and they'd definitely want a lot of lead time for an issue like this -- it requires a fundamental change in how an OS behaves. Now, if Intel's CEO knew and sold stock in response, that's a problem, but telling the security team wouldn't be an issue.
As for the timing of the disclosure itself... that'd be pretty lousy, too. If they really wanted to boost sales, they'd have disclosed in time for their holiday releases, not
after the holiday when spending is always at its lowest and new products are months away from shipping. Any uptick would be muted at best. And don't forget, most companies are several months or more away from shipping new chips that would be immune to the flaws.
Basically: if this was somehow a vast conspiracy between every major OS and chip vendor (not to mention Linux distribution coders who will make zero profit), it'd have terrible execution.