To add my two cents; there are so many new product launches all the time that you have to pick what appeals to you.

For instance; if you were to work at a large book store you would see hundreds of new titles every month to stock the shelves with. You wouldn't buy all of them, only some from the topics you were interested in. And, you wouldn't buy everything from the categories you like, only what you could read in a reasonable amount of time.

It's the same thing for Internet product launches. After reading the sales pitch find the topics you think you could learn from the most.

Don't worry about some people not making money because there are so many people, at so many levels of education, who like differing topics that most product launches will earn from their nitch enough from the people who are interested in that nitch to earn enough to get by or make a small fortune.

Obviously some launches will be a flop, either due to bad sales copy, un-interesting subject or a currently over saturated market for similar stuff.

I can tell you from my 20 plus years in marketing that most books are a rehash of old junk, or things that worked for the authors last year and they are getting what they can out of the info before it stops working. (I know, very pessimistic) There are always those few gems that making buying and reading a lot of junk worth the small tax deductable expense of most eBooks.

The real value comes to those who purchase "time saving tools" that work even half as good as the sales copy would lead you to believe.

Even better is to read all the sales copy to get an education on how to write good sales copy. If after reading a launch email or website you feel compelled to break out your credit card ASAP; STOP for just a moment and realize that you just read something masterfully crafted and look closer for what it was you read that gave you that compulsion to buy! Therein lays the real value of why to check out everything that comes your way in JV launches.

I hope this gives you some insight to why you should at the very least look at every product launch you can find even if you don't buy them all.