I started in stock last year march 2012 - I joined Alamy in July 2012 and GL Feb 2013
Last recorded BME:
Shutter: Apr-13 (July on track for BME)
Fotolia: Jun-13
123RF: Jun-13
Canstock: May-13
Deposit: Apr-13
Photodune: May-13
Graphic Leftovers: May-13 (one and only sale)
Nationale Beeldbank: May-13
Direct Sales: Apr-13
Zazzle: Mar-13
Fine Art America: May-13
Alamy: Sep-12
Istock not recorded as I have no clue how their reporting works.