It sounds like you're referencing the faq which states: (and has some links, so it's worth perusing if you're at all curious)
May I promote products or websites I am affiliated with here?
Be careful, because the community frowns on overt self-promotion and tends to vote it down and flag it as spam. Post good, relevant answers, and if some (but not all) happen to be about your product or website, so be it. However, you must disclose your affiliation in your answers.
If a huge percentage of your posts include a mention of your product or website, you're probably here for the wrong reasons. Our advertising rates are quite reasonable; contact our ad sales team for details. We also offer free community promotion ads for open source projects and non-profit organizations.
However, you're not actively promoting (as far as I can tell) a product of your own, just something that you've evaluated and found to be helpful. That's like me walking into Best Buy and the guy telling me that testdisk does an amazing job helping recover files on your media (it really does).
If, however, something like 40% of your posts were about "Gazzang" or a similar product, or about a loose family of related products, then we would start to wag our finger.
With an outstanding 30k+ rep on DBA.SE, and narry a complaint about your recommendations (is this really your first one?), and with this not being a shopping question, this is a perfectly cromulent answer.