Have you ever tried to report a technical issue to a Big Tech company, like, at all? If so, 'silence' is the best you can expect, with 'a threatening letter' and 'a SWAT visit' being the runners-up.
Example of the first: if your mail server uses the default-Windows-2016-TLS stack, Facebook's mail servers will immediately disconnect after issuing a STARTTLS command and receiving your server certificate. Why? No idea, everyone else seems to be fine, but this has been ongoing for years.
Second example: you can steal any Dutch "OV bike" simply by impersonating the MiFare classic UID of any valid subscriber, without any rate limits on those attempts. I reported this issue to them in 2016, they tried to sue me and failed, then tried to talk me and failed to listen, and to this day this vulnerability exists.
Third example: phew, none (SWATs are not as eager to mobilize around here), but I would not be surprised, like, at all, if I were to get an early-morning wake-up call just for trying to correct someones SPF records via an advisory email...