Ehh, a couple orders per day, so around $600/month but I have to order from Muji, pack the notebooks, and run them to the post office myself. I did go ahead and get myself a VA to automate part of the process on my end. The site pays for that and I get them for personal use too (http://TimeSvr.com - they were mentioned here a few months ago).

Then again it is December and a lot of orders might be Christmas presents. I'll have to see if it holds up afterwards.