Antony R.
Once very good, now ok.
From a contributor point of view I've found Twenty20 to be one of the best - certainly in terms of the cut that contributors get for each sale. There are also regular challenges for contributors which are great for sparking ideas and original content. The only issue I've found is that there are many contributors, mostly from India, who are copying images from other sites and selling them as their own. Twenty20 do have a mechanism for flagging them but they are still many copyright infringements on the site so check before you buy. Update: Oops, things have gone downhill rapidly. As a contributor their payment model has gone from $2 to a variable amount. What's worst - and this is scarcely believable as stock agency - they don't tell you exactly what you've sold, or when, or for how much! So you have to trust them implicitly that what they pay you is accurate. Accounting is now difficult, and checking copyright infringement is now impossible. Update: The transition to be part of Envato seems to be complete and images are selling well. Still impossible to work out how much and when each image sold.