DianeHelen, It sounds like you're using HuluPlus if you have a 3 month trail, which means you would have to pay for a subscription after that. Hulu.com as a website is always free as long as you're on a PC/Mac/desktop (you just can't stream older shows without having HuluPlus and paying).
Gallen14720, how are you watching Hulu, are you using a browser to go to Hulu.com or are you using an app to view it? Because when I just go there with my browser, I get the same error message that I get on my phones, saying that Hulu is basically not compatible with "mobile" devices. That's the reason I have been using the Wondershare Player app on my phones, it seems to have a version of "Hulufied" Adobe Flash Player built into it, but I can't get that app to run on my Note 10.1 (2014) for some reason.
P.S. - Not sure what's going on with those commercials that you're seeing...but when I watch Hulu, my shows play for at least 15-20 min before a commercial break.