The disturbing societal implications speak for themselves. Personally, I suspect a significant fraction of transactions on Only Fans or “influencer” platforms are money laundering or social engineering campaigns by deeply resourced actors. There may be a large number of clients that are bots making random subscriptions to keep the network alive and large enough to make moving targeted funds harder to observe.
A plausible scenario might be an FBI agent paying a confidential informant without creating an unexplained income stream. The FBI and friends disclosed spending around $0.5B on informants. The truth could be more. We don’t know what other agencies around the world spend. I imagine they aren’t putting cash in brown bags under park benches.