Please name the microstock sites that accept editorial images. Example: Barack Obama
Little quick lesson...
If you have a shot of a celebrity, it might sell a couple of times in it's lifetime before sinking to the bottom of the pile. You could put it on Shutterstock, sell it ten times, and then it's gone because it's not relevant anymore. Celebrity pictures generally aren't classics that keep selling. They are relevant for news coverage of *that* event. You've made $2.50.
If you put it with a traditional agency who do editorial, you could sell it several times for several hundred dollars before it again, goes down to the bottom of the pile.
Photographers who sell "news worthy" editorial shots on the micros are doing themselves a disservice. Go with an editorial agency and get the most bang for your buck. Make it worthwhile shooting this type of event.
BTW, did you know that OK magazine now pay less than 20% of what they used to several years ago for celeb pics? You get £20 now if your images is published. Obviously that's not for the feature spread, they're paid many, many thousands of pounds (got friends who have shot for them).
I'm all about targeting the right market with the right shots (otherwise I wouldn't have a portfolio on iStock). But celeb shots etc should be part of your premium brand, not part of your budget brand. IMHO.