My biggest problem would be with the honesty of the software they sell. I don't know how a piece of software no matter how sophisticated can tell me if "09.jpg" or "P10090237.jpg" is porn or not.
Since English has pretty much become the international language among educated people, and since anyone with enough dough to buy a computer is likely to both read English and be able to read a banner and also have some spending money, I'm not sure why they don't pay for non-English speaking traffic, since on the Internet, that would hardly exist. Paying less I might be able to see, but as long as they are letting non-English speaking people download and install the software, they owe the webmaster something.
In every business, some customers who walk through your door won't buy, don't intend to buy, and are just wasting your time and resources. So what else is new? At the grocery store, they put up samples of cheese and lunchmeat, and some of the people in the store just came to buy dental floss or a quart of milk and deli items are the last thing on their mind. So what? Does the store make them swear on a stack of Bibles that they are in the market for cheese or sandwich meat before letting them take a sample?