Coming in Waves

I've noticed over the past year that orders from my etsy shop come in waves.  It'll be tumbleweeds over there (except for Treasury features, which happen regularly for prints and sculpture), but no bites on jewelry for months at a time.  Then, out of the blue, I'll receive several custom locket orders all at once.  I assume that one sale makes the shop more visible than before, so is it a domino effect?  Or just a coincidence?

Many orders are from California, which makes me smile.  This time, an order is going to Ontario.  Thanks Canadian friends!