So how does this not make you a worthless freeloader?
I may be literally worthless to such sites. I just don't think they ever had a reasonable expectation that I would be any more than that, any more than someone paying for an ad on a billboard has a reasonable expectation that every driver will stop and read it, or any TV advertiser has a reasonable expectation that no-one is going to go take a leak during the ad break.
There is no law requiring someone to give their time to the ads just because they are there, and there never has been, making this a fundamentally different situation to copyright infringement, fraud, or whatever other bad analogies people are throwing around in today's discussion.
Ultimately, if someone wants a promise to be paid in return for their work, there are a number of options available to them, starting with charging for it just like every other industry in the world that produces value. And if the work has some modest value to a lot of people but the overheads of formally charging are too great, there are plenty of other ways to accumulate minor contributions without spamming disreputable ad networks all over your site.