I think the only show I've ever used Tubi for was Yu-Gi-Oh. I don't remember watching any films on there or any other shows. I can watch Yu-Gi-Oh on Crunchyroll now that we have that service.
I haven't used Tubi in a while, I generally use BFlix because there are more options and I find the movies sometimes freeze on Tubi. Though I can see why it is the most popular streaming service.
I’m not surprise, since it's free and due to the fact that it has huge library of shows and movies. I mean, I haven't seen anyone who doesn't love free entertainment.