As a novelist, this applies to all websites I've been on.
Gauge carefully what is the definition of the site "working" for you. If you judge strictly on views, or WT rating, or number of comments, you will end up nurturing a defeatist attitude in many cases.
Many sites for my novel do not track views per chapter, or do not track them in a way that is easy for me to access (Tapas being unique). And many sites do not support the way in which my novel is written - either length of content - or hard content (italics, ect). This makes it hard to judge what is a success site, vs what is not, for me. DeviantART's been fine to update to for most of the last decade, but with their newest rollout, they somehow hard murdered italics and the submission/editing process. Booksie only allows a total of 100 chapters. Ao3 is not built for original works. Figment, Mibba, and many other sites, rely on what Tapas currently has done - showing "how many likes" are on a piece, which somehow garners how many people will future click in to read it.
Every site has their drawbacks for multiple different reasons - community, reading style differences, or just how the site's base UI is set up, vs how the search function works. My point being, that if I wanted to, I could say that Tapas "isn't working" for me either, because while I have consistent views each month since being here, I have virtually no comments, and the views on one work do not cross pollinate to another work.
I still cross post to Ao3 now and then when I think to, but I'm not certain if I'll cross post to dA anymore if I can't figure out what's happening with their italics system. I literally have submissions over ten years old back from when you had to paste, and go into editing and manually enter the HTML italics code to make it have italics, and how sick I was of doing that. In dA's current set up, that doesn't even work.