There was IFTTT but looking at their page now it seems like maybe they have pivoted, at least I can't tell that it works like it used to: https://ifttt.com/
If you sign in all the previous functionality is still there. Seems their landing page is only advertising their new "Do" apps (which are a one-button extension of the old IFTTT recipes). Installed it, but never used them much.
It's amazing how much a shift of management focus can change things... Google embraces RSS, develops the premiere online RSS reader, so good that even stand alone readers are largely abandoned... then google nukes RSS support from Chrome, and shutters Reader. And the world is worse off for it.
It definitely inspires a "never forget" kind of mindset, such that I don't trust relying on a SaaS that I don't have a personal exit strategy for.
Zapier is the only reliable tool I found so far that can still import RSS to facebook pages, it tried it with pipes and it had issues with non-standard fields.
I liked the concept and probably didn't give it a fair shake, but it flooded me with notifications and I just didn't want to take the time to tweak it to my needs. Its one of those apps you need a good tutorial (from someone other than the creators) to walk you through useful functionality and setup.
The only thing Pipes would need is a .io domain and it could be dressed up as the Next Cool Thing which LargeCorp is desperate to get its hands on to prove it's still cool.