I found my portfolio too there 
Maybe they are partner of some agency, but I've never gave permission to offer use for free

Found my portfolio too. Images seem to come from Dreamstime.

yes with canstock. "C S P" image numbers.

how can canstock become affiliate to such partners and offer the images for free, very shady business.

It's a common enough practice to offer free samples or tasters in a lot of businesses. So it's not shady at all.

The real question is do we get paid for the freebies?  Now if we don't that is shady.

Answer from Canstock:

nFreeart.com is run by our affiliate Fotosearch. On Freeart the only the smallest print size on paper is free for the customers, they only pay for shipping. You would get paid the Paper Print Minimum Commission (e.g. free print offers) of $0.25. https://www.canstockphoto.com/payout_schedule.php

Freeart will is marketing your content for print and product sales. You would receive 20% of paper print sales as you always have, and will now also make sales on other physical products (e.g. acrylic, metal, canvas, etc.). These are higher-priced retail items with a 10% royalty, which will result in higher commissions (up to $49.90) than most digital image sales.

It is possible to opt-out of selling your images on Freeart, just keep in mind that you�ll be opting out of the entire site, and will forgo any of the high commission print offerings.

Please confirm if you want to remove your portfolio from Freeart and we will take care of it immediately.

I hope this helps.

Regards,

Sorina
Can Stock Photo Support

Answer from Canstock:

nFreeart.com is run by our affiliate Fotosearch. On Freeart the only the smallest print size on paper is free for the customers, they only pay for shipping. You would get paid the Paper Print Minimum Commission (e.g. free print offers) of $0.25. https://www.canstockphoto.com/payout_schedule.php

Freeart will is marketing your content for print and product sales. You would receive 20% of paper print sales as you always have, and will now also make sales on other physical products (e.g. acrylic, metal, canvas, etc.). These are higher-priced retail items with a 10% royalty, which will result in higher commissions (up to $49.90) than most digital image sales.

It is possible to opt-out of selling your images on Freeart, just keep in mind that you�ll be opting out of the entire site, and will forgo any of the high commission print offerings.

Please confirm if you want to remove your portfolio from Freeart and we will take care of it immediately.

I hope this helps.

Regards,

Sorina
Can Stock Photo Support

Thanks that's the answer.

how can canstock become affiliate to such partners and offer the images for free, very shady business.

CS only, you get 25c commission, another CS cheap program. Another agency trying to grab the last money, from your work, before they go under. Stop supporting the bottom feeders.

I see my portfolio too but can't log in to see whats going on!?

Read above, Canstock is giving away your images for free. Two choices. 1) Drop them or 2) take the minimal money from CS and admit you don't mind them giving away your work for free, because you need the pittance from CS sales.

Personally when things like this have happened, I dropped agencies. I don't mind making a little less, because I'm not going to sell out and become a willing victim of this abuse. As long as people keep working and supplying these places, they will keep using and abusing us. You have a choice!