The cost of YouTube Music is $11 and YouTube Premium, which include Music is $14. To me that indicates that you can run YouTube for a given user for around $3 - $5 per month. Trying to watch YouTube with ads, the shear amount of ads and the length, could be a sign that ads on YouTube is almost worthless, at least they seem to struggle to get $5 per user per month.
YouTube isn't going to die at the hands of competitors anytime soon though, because the cost will deter anyone interested.
Content ads: not nearly as much.
https://www.macrotrends.net/stocks/charts/V/visa/profit-marg...
https://www.macrotrends.net/stocks/charts/VRSN/verisign/prof...
Epic electronic health records software is not a publicly listed company, but I would guess they have massive profit margins too.
> You never hear about someone’s salesforce being ransomwared or their servicenow being held hostage
You may hear about business organizations being unable to do work due to ransomware. Likely nobody mentions their inability to access salesforce specifically, because 1. the data in there usually isn't controlled and 2. likely nobody is going to die if they can't log into salesforce.
See how easy it is to make random statements on the internet.