Nowhere in the comment you're replying to is it stated or even implied that men suffer a significant social stigma from consuming porn, nor that women DON'T suffer a social stigma for producing it. The viewpoint you describe is certainly twisted, but it hasn't actually been expressed by anyone.

> named & shamed a random working man for spending money on porn

How would they find out?

I don't know enough to decide with certainty if the post in question is right, but it definitely seems earnest. I believe the poster sincerely holds those beliefs.

People seriously believe being advertised at is "just as much a negative" as the stigma from being a porn actress? I have no appreciation for the advertising industry, but this is hard for me to believe.

I don't know about "just as much". Negatives like these are hard to quantify and therefore hard to compare. What the men are paying for on OnlyFans is a pseudo-connection or a fake relationship. This strikes me as being emotionally, sexually, or romantically manipulative or exploitative.

Of course the men choose to contribute but the incentive structure is for the women to foster a sense of intimacy or connection so they can exploit it for cash. It's a voluntary association, but it doesn't seem like a morally neutral or harmless association to me.

This is not to say that the harm men face from exploitation is greater than the harm that women face - or that women don't also face this phenomenon, but just that it is also a harmful byproduct of the service.

I think what was meant is a belief that porn addiction causes brain damage (to the addict).