I'd say this depends on what you'd consider it 'being worth it'.
Personally, I have some short stories/novellas written that go with my main series and put them up on Tapas as a collection that I'll continue to update in the future. To me, it's worth it since it adds a bit more depths to the story/world without being absolutely needed. It's just a small thank you to my readers.
Other than that, looking at it from the perspective of numbers it's one thing more I have up here so another thing that people can discover my stories through but for the most part, it probably won't bring in any new readers since they don't even know the characters so reading it on its own might not be too simple. Since there is only one project you can get ad revenue from, it's also not like I'd earn anything with the collection so there's that.
So overall, there are a few advantages to posting and some things that are neutral but no real disadvantage (as far as I've considered it) so I don't see any reason why I shouldn't post it here.