Understand, I have no problem with the idea of WSOs in general, and I'm glad that WF provides a forum in which to market them. IMers are a very real and large demographic, and there is absolutely nothing wrong with selling products or services to them. The problem comes in when WSO sellers learn a few tricks of the IM trade and misuse them - which results in products that are priced way above their value and programs that have no reasonable hope of success. It's time to take quality up a notch, and this is why:
First off, most sellers in this market segment rely on their next promotion for continued income. Of course there are exceptions: the truly outstanding products are sold from a single site for years, and almost all the long-term sales come from word of mouth. But if you have a crappy product, you can still keep the revenue coming in by releasing another crappy product in a month or two, as long as your list is big enough. You don't need a high response rate (just a quick response), and it doesn't cost any more to promote to a large list than to a small one. Good products or bad, the online game is won by the size of your list. The sellers with crappy products generally sell to the same group of customers again, and again, and again.
Another problem comes from misusing price points. A "coincidentally" large number of WSOs have one-time prices in the neighborhood of $200 and/or monthly prices of around $20. Obviously some of these are genuinely worth the price. But in other cases, the sellers are simply using market research data (gathered over many years) indicating that these are prices that the customers will readily accept.
The third problem is specific to various programs that have payouts: these can be legally delayed almost indefinitely if the program owners are less than ethical. For example, they can make the minimum check too large, demand extra paperwork, and slow down replies to associate requests by weeks (until many of them just give up). In the worst cases, some of these programs managed to go out of business before paying any commissions at all. When I see a pitch for something like "Give me $20 a month and I'll make you $10,000 a month in commissions," it amazes me that so many clients don't bother to wonder how you can take more money out of a program than there is money coming into it.
Anyway, that's my rant. The WF staff may or may not be able to do better quality control in the WSO forum, although I hope they can and are willing to. But even if not, you can now use what you learned above to spot the WSO snake oil.