You operate a business which is part, whether you like it or not, of the industrialized copyright infringement and distribution networks which do flout the law and which are illegal
I understand your distinction that you yourself are not doing anything illegal
However, at some point you made a choice to operate this business
Possibly, you were naive and did not think that your service could be used for illegal purposes. Consider yourself now better informed and able to revisit your choice. This removes naivete from the list of possible excuses.
So you are able to make a characterisation: some or all of my customers use my services to carry out illegal activity.
Now you have a different decision that you can make: are you comfortable making your living taking money from those who are effectively acting as criminals.
Please note: I'm not making a judgement on you or your business. Simply pointing out that these are the decisions and assessments that you may have to or have made. Because there are implications. In many countries, as an owner or a Director of a business, you are liable for your actions and business decisions, including those of trading recklessly and there are legal penalties.
From my point of view, your business appears to be acting in the role of service provider so you have no direct liability for your customers' actions. A bit like a lockup storage operator who is not liable for any use of his facility by criminals to store stolen goods etc. However, at some point, a lawyer will make an assessment that your lack of diligence may represent aiding and abetting a crime. In which case, all bets are off.