There might be some that are, but I assume a lot of them are useless; not even necessarily because of how small the rewards are, but because Bitcoin fees are a lot higher these days than back when they were plausible. I could easily see fees (because you have to consolidate the inputs somehow) eating up most if not all of what you've earned in a day.

Most of the traffic probably come from newbies who just want a taste, or people who literally have nothing else to do that they may as well earn a couple (maybe even literally a couple lmao) of dollars. It's not worthwhile for a vast majority of the population.