The thing with Netflix is it only works after you've given them your money. They do have a great recommendation algorithm, but ours lets anyone get results, without requiring you to 1) be a paying customer and 2) already have chosen dozens of things you already like.
True. Yes it is a for-profit site, although as of now only through amazon affiliate links. We have no plans for any kind of subscription model similar to theirs.
There's no barrier of entry.