I didn't get that amount of variations the OP sees so far, but I've been wondering if the number of ads you get and the distribution of skippable vs unskippable

I didn't get that amount of variations the OP sees so far, but I've been wondering if the number of ads you get and the distribution of skippable vs unskippable ads is somehow personalized. At least my subjective impression is that when I go on a youtube binge, over time it will slowly increase the number of ads it shows back-to-back and also increases the amount of nonskippable ads. I wonder if there is some kind of reinforcement learning going on, which tries to figure out just how many ads I'm willing to tolerate before switching away. (Or employ the good old "boiling frogs" strategy and train me to tolerate more ads over time) I got no evidence for this at all of course, so just a conspiracy theory for now.