I have admittedly not put much effort into my Spreadshirt store since setting it up, but in the past several months I have sold maybe 4 items, and those were all at zero profit since they were either to myself or friends/co-workers. I really like Spreadshirt's quality for t-shirts (gifts not as much) and their licensing terms are much cleaner than Zazzle or Cafe Press, but even so it is time to try something new. I think I will put my Honey Badger designs up on Zazzle in the next few weeks, and hopefully get some idea if it is worthwhile to pursue it further.
I'll leave the spreadshirt store open since they would be my preferred place to buy for my own shirts.