If the developer of Photopea went to work on advert technology what would happen? The world would loose this great piece of software, one of the worlds richest advertising companies might get imperceptibly better at targeting ads, and the creator has to stop working on his own pet project which he is doing on his own terms and work on whatever his boss tells him to. Besides, if he achieves his goal of becoming one of the most popular image editors in the world, there is a good chance Photopea will be much more valuable than he will have earned as a salary at FAANG.
I think that 90% of ad tech is useless shit technology that just exists to take a cut of the money, without actually providing much of a value to anyone.
It's like realtors or financial advisors or other middlemen like that. The main reason for them being there is that it's a very profitable business to get a cut of somebody else's transactions.
May have sounded nice, but successful creators eventually become advertisers. As long as they have money to spend on marketing, they'll spend it to get in front of the right people
And, since I have an almost pathological hatred of adverts, I block them and use Stylebot to remove the space where they'd be.
But I'm glad the dev is making a decent living from what I've previously described as probably the most impressive web app I've ever seen. He deserves rewarded for his work but I'm sorry, I'm NEVER even looking at --never mind 'clicking on'-- a single advert while using the web, if I can possibly help it.