Question: Is there a service that provides a paywall for cloud storage, allowing me to earn money from file downloads?

Fewsats is a serverless platform that lets developers and companies sell digital products and services through paywall cloud services. It comes with Storage as a Service, which lets customers sell files and get paid when people download them. The service also includes Data as a Service (beta) and other paywall features, so it's a full-fledged service for protecting and monetizing digital assets.

Another interesting option is Dappier, which is geared toward content creators selling data and content to AI companies. The service lets you control who gets access to your content and how much they pay, so it's a good option for news and financial services. Dappier also offers revenue from syndicating content at prices you set, so it's a flexible way to monetize your assets.

If you prefer a privacy-first approach, Ocean offers tokenized data and AI services. It uses Data NFTs for customizable access controls and encryption, and it supports decentralized data marketplaces. The service is good for people who want to monetize AI models and data but also want to maintain privacy and security.

Wirestock is another service that lets creators sell their digital assets on multiple major marketplaces like Adobe Stock and Shutterstock. It also includes an AI image generator and upscaler, so it's a good option for people who want to generate creative assets and sell them for passive income.