The Magento "ecosystem" is hugely dependent on 3rd party extensions. Some are free, but many are commercial extensions. How do we balance appropraite answers involving third party extensions vs. spam?
For example, when someone has a super long question about setting up complicated shipping rules, a common and popular answer would be to recommend they purchase and use the WebShopApps Product Matrix extension.
Similarly, someone whose purchased the Product Matrix extension might have a question about how use it.
I think these sorts of questions and answers are valid and useful for the proposed StackExchange site and the Magento ecosystem, but they leave us open to spamming opportunities. StackOverflow itself has this problem to some degree, with 1 rep users showing up recommending their extensions on every question that has the right keywords. (which, thankfully, gets stamped out quickly by the moderators and/or automated systems)
What level of self-promotion or promotion of other's third part products should we allow on the Magento StackExchange site? I know the knee jerk reaction is none, but a big part of being a Magento developer/service-provider/maintainer is picking the right extensions to use on your site. We'd lose a lot of valuable information if we stamped these sorts of questions out entirely.
(Disclaimer: I sell a Magento debugging extension and ebook, so my views have some obvious biases to them)