If you have a blog going which is a traffic generator, surely part of that is getting into the habit of including at least ONE link which will help you when you post ANYTHING ANYWHERE.....it must be hard to fight the instinct to include a link huh? It pokes a huge hole into the brush off "oh I forgot" kinda response.
I can think of a couple of possible reasons why fought the urge to stay linkless......
1 - You didn't want anyone clicking through with the idea of "copyright infringement" on their minds....it's not a great word association if you want them to buy stuff from your affiliate codes.
2 - You may have been caught out and wanted time to remove it before giving out the link and playing the "innocent and wrongly accused victim"
3 - You know (by the subject matter of your blog) that search engine spiders love backlinks, textlinks etc.....they assume a better linked site is more popular. So having other peoples text appear via RSS feeds helps your search engine performance.
I also notice that you didn't respond to the question too.....for some reason I'm picturing a used car salesman here. Deflection of an accusation only makes you appear guilty......it's why many people no longer vote.
I did click through a few blog entries on your site, they remind me of the "get rich quick" scams you often get spammed with. All with seemingly invaluable advice which will guarantee to make you a millionaire if you buy this (insert product via affiliate code here).
In fairness it seems that not ALL of your blog seems aimed at this...for those who can't find it......look right down the list, there are a few tucked away at the bottom which appear more personal than financial.