Suljo,
Only crazy people are contributors who think they will be treated well as non-exclusives from Istock and Getty in global... Rest of my thoughts we share by telepathy because Getty has too much 'solicitors' and 'lawyers' ;-)
[ADDED:]
Not to mention biased exclusives and some woman who's name begins on A ;-)
Anyway, iStock is iStock and nothing less than iStock!
BTW, Depositphotos will eat thinkstock for breakfast... What will be lunch for Depositphotos I don't wish to predict ;-)