As long as the instances who's content you're trying to interact with are federating with your instance (beehaw), then you can interact with everyone, yes. It's important to keep in mind instances can choose to not federate entirely, or selectively block certain instances from interacting with theirs, although this isn't something you should have to worry about.
amanneedsamaid
joined 1 year ago
Because their business models can never be profitable AND provide the best possible user experience.
The owner has also said via Reddit:
"My long-term vision for RedReader is to restructure the app to more easily support other sites, including Lemmy, and perhaps others such as Tild.es and Hacker News. Before the API changes were announced, I was already considering adding RSS reader functionality to the app, and I think it would be cool to work with some kind of “open forum protocol” which would allow a variety of websites and apps to interoperate with each other through a uniform API."