Like a retweet. People that follow you will see what you boost on their feed.
You can subscribe to magazines/communities but and follow users.
Also, upvotes (on kbin) are favorites. And any upvote/downvote will show you did it and federate to other instances. For example go to “more | activity” on your comment and select “favourites” to see what I mean
That’s true. Just something to consider since there are real life bad actors and things can and will be a security/safety risk for some groups