There are advanced marketers making thousands of dollars a month just with GSA. So yes, its worth the money. But not if you're a lazy pos. A lot of newbs buy GSA than bitch about the fact that there is A LOT to learn. Out of the box you're not going to get 100-200K links a day. It took me 6 months just to work my way up to 100k / day. But now that I know what I'm doing I'm making a lot of money thanks to GSA.
Just remember, you're going to have to spend many hours / weeks / months reading tutorials and tweaking shit. So don't buy it unless you plan on actually learning the program. Otherwise you'll be one of those idiots who tries to sell their license weeks after buying it. And I can't fucking stand people like that.