My impression is that letting people upload CSAM to a cloud service has no positive benefit because of the supposed link between CSAM consumption and CSA, and i

My impression is that letting people upload CSAM to a cloud service has no positive benefit because of the supposed link between CSAM consumption and CSA, and it carries a very high risk of criminal liability, so there's no incentive for companies to completely ignore the files that users upload. Otherwise, people will eventually notice and the service will be denounced as "pedophile-friendly," and then the law will take notice and force them to give up the data. This type of scenario is what happened with the messaging service Kik, which was reportedly used to distribute CSAM in private chats. Law enforcement agencies said the company wasn't providing timely responses and that children were being actively abused as a result. This is about as damaging of an accusation you can leverage against a company. Laws against CSAM worldwide are not going away for good reasons, so there is always going to be a justifiable argument that storing certain classes of data is illegal. Hence, anyone wanting to run a cloud service that stores user data will have to obey by those laws, regardless of how proactive they are in scanning for the material. Absolute privacy in the cloud is impossible to achieve with those rules in place.