It's pitched as being for Iot but it's incredibly flexible that you can do anything with it.
Alternatively, check out the source code at https://github.com/gorenje/cdn.flowhub.org and run it locally or somewhere else.
There are SaaS offerings for Node-RED or you can install it yourself but there isn't a one-click-Node-RED experience but https://deadred.flowhub.org provides that by being a serverless, static frontend-only version.
i'm building a dev API on top of https://github.com/BrowserBox/BrowserBox that should provide the same functionality as a CORS-proxy / unrestricted iframe to be able to embed and interact with content across origins.
Like, smart people?
Not everything has a profit motive behind it. We have this entire concept called charities and philanthropy that also show cases how people will spend their own money to accomplish goals or viewpoints.
You've never hosted a fan site or a squad or guild site for a game or movie? Or ran a discussion forum? Or hosted an irc server for a community.
Not once did I expect payment for any of those.