Well done, please have this large cookie and a medal. Just because you haven't been smacked down yet, it does not mean you wont.
I know plenty of friends/business partners who have managed to survive well over 12months of casually trading eBay feedback without any issues and then when they suddenly start building up an actual reputation through legit sales they get their whole account banned.
In my eyes if you are using eBay for a legit money making reason then there is no reason for you to trade/buy feedback, if you do then you are pretty much scum