Apple is not that different from the status quo on end to end encryption as to necessitate a conspiracy (probably even in jest ). They have no icloud encryption, no photos encryption, no device backup encryption etc etc.
https://support.apple.com/en-us/HT205220
As far as the original article, I agree completely that not paying and crediting these folks in a timely manner is just stupid and will reduce Apple security long term.
If you don't like that "feature," don't do iCloud backups. I do direct backups as described in the support link. Apple doesn't have those keys.
Ask anyone who works in one of these organisations and they will attest to how many former IC people fill the ranks in certain areas.
https://support.apple.com/en-au/HT201222
Why would they bother fixing any of the bugs ?
Apple doesn't want to patch zero-days used by US authorities in order to alleviate pressure on its encryption practices.
So they really only want to fix zero-days that are known broadly or get media attention. And they don't want to give too much incentive to researchers to report zero-days to Apple instead of selling them to the highest bidder (which may ultimately be the largest governments with the greatest ability to regulate Apple).