Okay, so I totally go through spurts of browsing the casual encounters section on CL, as well as the missed connections and "misc romance" sections. I think it's just a perverted, morbid curiosity thing on my part, and then the missed connections is just interesting, lots of little drama sagas going on there. "Rants and Raves" is sometimes entertaining but not usually because it's mostly just racist and political rage posts. So just throwing myself out there as an example of how someone might be gawking with no intention of acting.

What is troublesome about the situation you describe is that your husband previously used CL to hook up and have casual sex. What you should also know is that regular women wanting casual sex on CL are about as rare as fast food jobs that pay $50 an hour. Might exist somewhere but good luck with that. There is an extremely high probability that his "casual encounters" were with prostitutes, as the vast majority of women in the CC section are prostitutes. They require "flowers" for a "fun time".

So this not only means that your husband has a history of hooking with strangers from the internet, but he also probably has a history of using prostitutes.

Therefore, it is very likely that he was indeed looking to hire said-prostitutes. If I were you, I would get an STD check and just abandon ship.