I dont think your hijacking the tread. Your just wanting info on specifics of setups!
Mediadog is not free. But two bucks or so goes a very long way in this case.
You cant actually browse new Tvshows that you dont already have, but you can add new tvshows through the app.
So in my case, my wife says "I want YOU to add a new show called Glee" I say "bite me...", no really I say "Yes mam". I grab my android phone or tablet, open up mediadog, then go into the sickbeard section and add the tv show. Depending on the size of the files (episodes), I will have the show automatically added to my xbmc box's within mins.
Yes, you do have to pay to use Usenet. I do not see it being a "catch" in this case though. Usually gimmicks have a "catch". I am suggesting that you do some research on usenet. Watch some videos about it. It was a deal breaker for me as well. Until I came across a free trial. Then I tried a 20$ block account (around 200gb). That lasted me about 2 1/2 months. I was hooked after that. Im not a media hoarder, meaning I dont keep everything I download. Just the good stuff and I usually only have the current season of each tv series I have, not all 9 season of whatever.. This way, I dont have to invest in more TB space and I can download everything in high quality HD.
I dont have cable/uverse/Dtv/dish or whatever. I have had them all in the past. I will never go back to paying 100 bucks a month when I can do it all for 10 bucks a month.