Busking is not begging though and they don't advertise or try to sell you cds. If you give them money they'll appreciate it but they won't harass you if you don't (well there is always bad eggs but they aren't the majority).
There was an old guy playing violin all year even when it was super cold and I walked past him everyday and gave him some money. Not because he asked but because I wanted to. He was always appreciative and we both had a pleasurable experience.
I believe you can separate your business and private contributions by having an onlyfans link in your bio but not directly advertising it in your posts.
Kind of like I get paid as a software developer professionally but I still contribute to open source in my free time. Of course potential employers could go through my free stuff and then decide that they want to pay me to work for them, but it's not directly marketing my career for people not interested in it.
They don't need to sell that information to be untrustworthy, they just need to lose it.
This is how people steal your identity or buy stuff with your credit card even though you only gave that information to big corporations. It has happened a lot and is still happening.
As someone who has worked on large databases I can confidently say that every single piece of information the company had on all of it's customers was available at my fingertips in clear text except for the passwords which I could have cracked in the thousands per second if they had less than 9 characters, which a lot of passwords did because the requirement was at least 8.
The only way the company can prevent me from doing malicious things with your data is if they only hire people with a moral compass and paying them enough. And the first one isn't exactly easy.
There is not a lot you can do as a consumer to not get taken advantage of except minimizing the amount of data a company has on you because they don't care enough and you will care once the police comes knocking on your door because of a crime someone did with your identity.