Using multiple privacy tools requires managing complex proxy rules across different software, which can be error-prone and time-consuming.
Build a unified interface or API for managing proxy rules that works across popular privacy tools. Include pre-configured rulesets and simple rule editing.
Privacy-conscious users would pay for simplicity and reliability. Developers building privacy apps could integrate this as a paid service.
Start with a simple GUI that imports/edits rule files for one popular tool. Gradually expand to support more tools and add automation features.
The biggest risk is keeping up with changes in underlying tools and protocols.