Some cultural norms are outdated, but prostitution is still degrading and dangerous for those practicing it, especially for the women; who may not be doing so willingly, prostitution being the main incentive for human trafficking. And the online medium doesn't change that by much.
Some people may be willing to pay for sex, some people are willing to pay for many other things or activities that should be or are illegal.
Consider the sex workers who deal with mentally or physically disabled adults. Most people have sexual urges, and those who are unable to participate in society in the usual way of addressing their urges with a romantic partner or a one-night stand still have them. There are a good number of very professional sex workers out there who can provide these people with sex (often with specific expertise for the relevant handicaps) and generally significantly improve the wellbeing.
Are those sex workers doing something they shouldn't be doing?
Would you rather be flipping burgers all day for 30k or would you rather take a few nudes every week and make 300k?
degrading: no. I've met prostitutes who very much like their work and find it empowering
dangerous: ...yes, because it's illegal and they don't have access to proper legal protection.
You are asking a binary question for which there isn't a binary answer. Better to ask are those sex workers doing something they will get a pat on their backs for from other members of society? In a way a builder, chef, firefighter, and even a prison guard would.
OF is like the wet dream of a drug dealer or whoever else with a baby momma and some kind of scam/fraud/counterfeit operation.
Why? Especially compared to e.g. advertising/marketing? At least in the former case, all parties to the transaction are there voluntarily, for an honest, mutually beneficial exchange of value.