No idea what my post count is until I hit "Post" here, I mostly just search avsforum for information and never really "give back" by posting.
The truth of the matter is that most software companies will extend a license in return for a review, Mezzmo just did the questionable practice of putting it in no uncertain terms on their site.
To play devil's advocate, it probably gets people to use their product. No one wants a free license of a crap product, so the reviews are probably genuine, if somewhat forced. The problem occurs when people are so giddy about getting something free that they don't write objective reviews, you see this with a lot of blogger sites.
I've used Mezzmo
, and TVersity simply for the sake of writing a review rather than my personal needs. I've linked to my reviews, I'm working on TVersity at the moment. Mezzmo is far ahead of TVersity in many ways, the codec issues being the biggest one, but TVersity is even just less polished overall.
For playing internet content, PlayOn has worked the best in my opinion, but they've always had problems with local media. For local media Mezzmo works far better than any of the others that I've found, especially when going to something like a format finicky Sony TV.
EDIT: All only my opinion, so take it with a grain of salt. Looks like I at least have two digit post counts.