I’d love to see and give money to a project to create and maintain easy to use and stable “adversarial interoperability” APIs for as many services and products as possible.
Perhaps companies and projects would not often use these directly because of the risks (hopefully some would, though!) but individuals could drop the library or the URL to a server hosting it into their apps to gain extra features.
If standardised, whole open source apps could be built around them that allow querying and analysis of data from services and aggregating and automating using the services including optimising prices, taking advantage of offers, and using undocumented APIs to the users advantage.
Maybe something architected and incentivised like https://thegraph.com/ for adversarial intercom and undocumented APIs. Building as a network of nodes and funding with crypto would make it harder to attack and take down.
[0] https://www.eff.org/deeplinks/2019/10/adversarial-interopera...