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 slowly gaining market share since 2004. It is very pleasing to hear recent news of affiliation with fotosearch, this will hopefully increase sales levels through syndication, which are at the moment quite low.
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.
Slow sales but with the recent fotosearch affiliation things are improving. Canstock is not a high priority for upload, but certainly not one to write-off either. Canstockphoto has potential, so for the moment I'm uploading and measuring results.
The new site makeover (July2011) and changes to the search system should make this site more somewhat attractive to buyers.
In 2012 Canstock just managed to bump themselves into 5th place in my earnings ranking - mostly due to some large syndication sales which knocked bigstock down into 6th place: it might be wise to take canstocks position in 5th place with a pinch-of-salt (comparing them with 123rf and bigstock), or perhaps the syndicated sales are canstocks biggest earner for all?. We'll see if they end up in the same rank next year.