I've never really understood the appeal of phone sex, strip clubs or cam girls either
Strip Clubs is a different bird than the other two things you mentioned. On the topic of "simping", defined as a typical man making every type of investment (spiritual, emotional, or financial) they can to garner the affections of a typical female who will take such investment and never reciprocate in return. I'd say paying $50 a song for a lapdance is such reciprocation, since you're getting some kind of physical or emotional connection (even if it's not genuine), there is still an inherent value to the person getting dry-humped for the money he puts forth.
Phone Sex and Webcamming is 'simping', where in some cases a such a male would pay a lot just to hear a woman moan his name over the phone, or scream it loud as they see her on camera ram a 12" dildo in her ass because you paid her to. But there is no physical reciprocation attached, no chance to meet the her in real life, no real payoff for the investment. But will still throw hundreds or thousands at her anyway. Yet, somehow finds some small measure of gratification and importance for doing that, which is 'weakness' in my opinion, since (as some people already said) "porn is free anyways".
Like buying a bus-pass for the price of a luxury car, so they can feel like king-shit while riding the bus, while other riders are looking at them like a retard.... that is something no one could understand.... But at least with strippers, you are getting something somewhat more real from them.