It is not quite true that http://caseorganic.com, http://aaronparecki.com and http://tantek.com do not provide a RSS feed. They do indeed, but sadly just don't link to it in a visible manner. You need to install some RSS-button extension which will show to you who offers a RSS feed which is only linked in the head-part of the HTML. For Chrome this one works well for me: https://chrome.google.com/webstore/detail/rss-subscription-extensio/nlbjncdgjeocebhnmkbbbdekmmmcbfjd there are similar ones for all the other major browsers. But I agree that it is absolutely not obvious for normal people that they offer feeds.