The eBook is great, coming from someone currently using the service. I definitely agree about not selling an eBook that has readily available information within. Sure, the average user may not want to spend time looking for ways to make money online--they want it handed to them--but actually having the information available is nice.
The system is great for those who spend time on forums regularly. They don't have to abide by a new routine. But it's not a great route for those unwilling to post quality information, or spend the time to spell check, as you noted. Grammar is especially important when a company is paying YOU to post in forums. If they aren't sending out quality posters, their clients will be unhappy, request a discount, or even leave.
But actually taking the time to explore and post in all of the available threads is where the profit comes in. You just have to be willing to sit down and spend an hour or two each night and watch the points rack up.