Images are good value with credits costing 50c or less if you buy bulk. There is also a subscription option, with a weekly 70 images subscription currently at around 35 dollars.
The site has been gaining market share and growing their image collection since 2004
Good statistics monitor photograph views and an itemised history of sales. Since the affiliation with fotosearch the upload system has been streamlined, and sorry to use the cliche but there is no better way to say it, "uploading is a breeze" there is no need to spend time categorizing images.
For the photographer commissions rates are well above average, at the time of writing the sales are quite slow. The site features good stats and sales reporting tools.
Further to my previous comments on photos all being rejected with a standard "* Image does not meet our current content submission standards." it's been pleasing to see that recent submissions now receive useful rejection reasons which can help photographers reduce future rejections.
The site makeover (July2011) and changes to the search system has proven to make this site more somewhat attractive to buyers, but the fotosearch syndication as been the real success here (for me at least).
In 2012 Canstock just managed to bump themselves into 5th place in my earnings ranking, in 2015 up to 2nd place just ahead of istock, this was mostly due to syndication sales from fotosearch. Successful sales results year after year secure canstock a "must upload" recommendation.