I may be imagining it, but I think CanStock might have increased the cash prices (versus credit prices) for images.
What I see now is that a large is $7 cash and 4 credits. I tried to look at the wayback machine to see old versions of the site but got a message saying that the site couldn't be crawled because of its robots.txt file...
So I don't know that CanStock promises 50% (a long time ago I think it did). For Fotosearch sales I think it's 20%. For sales on the site, you would get $1 for a large sale that was credit based and $2 if it was paid with cash (you'll see Regular and Instant in your sales list.
If the price for a large sold for cash is now $7 - and I would have sworn it was $5 until recently - then we get 28% of the sale versus with credits (4 could cost from $2.40 to $1.76, giving us from 41.6% to 56.8%). Even if you account for PayPal fees on a cash purchase (I pay 2.9% plus 30 cents a transaction on sales from my own site), that would be $1.083. Our percentage of the net ($5.917) is 33.8%
So CanStock does much better out of a cash sale any way you look at it.
Does anyone have any old price data to see if the cash prices went up without us getting an increased royalty?