Some how I don't think the people that want to pay to get rid of ads are the ones clicking on them.
Anecdotally someone I am close to doesn't seem to mind ads and regularly buys products from them, I block ads and rarely ever buy products from them. I'd pay for not being served ads in the first place
It's not necessarily about clicking the ad, it's also about brand awareness and the subconscious effect of having seen it.
In the back of your head when you see the product the next time, you might think to yourself "I've seen this somewhere before... it's probably reputable." Or when you're in need of something, that brand's product might pop into your head sooner as something to assess.
Anecdotally, I click ads and buy things from them all the time and I have all ad free subscriptions: YouTube, Netflix, Amazon, WSJ, Economist. Lots of stuff. Instagram doesn’t have an ad free thing but I would have paid for it in the past. Not any more though.