I will say this about regular sponsorship - and if you’re a company bribing Youtubers to shill your shit, take heed:

Whenever a Youtuber interrupts their content to sell me garbage I don’t want (and SponsorBlock doesn’t catch it), I take note of the company and it goes in the very long shit-list of companies I try to avoid patronizing.

The more Youtubers that company bribes, the higher it rises in my shit-list.

The more the Youtuber tries to seamlessly weave the plug into their narrative, to sneakily make me watch it by not realizing they’ve switched to the plug, the higher the company they shill for rises in my shit-list - and this one annoys me no end, so the companies that pay Youtubers to make clever seamless transitions to the plugs go very quickly to the top. If you’re going to waste my time with your fucking shill job, at least be honest about it.

When a company is on my shit-list, I will go the extra mile and then some to never buy anything from it, even if it sells the best and only product I really want. Fortunately, they rarely do: it’s always shit.

Examples of companies at the very top of my shit-list:

NordVPN (or any VPN supplier I hear about on Youtube really)
BetterHelp
Brilliant
…

They can all fuck right off.

I do make an exception for those Youtubers who shill for quality content platforms that are alternatives to Youtube, for documentary and science videos and such, like Curiosity Stream. Not because I like the shilling, but because they advertise a service that competes with Google and that always gets my vote.