A long time ago iStock did, but no one else that I know of. For the time I was exclusive there (2008-11) I submitted in aRGB and then had to make sRGB versions of those files when I returned to being an independent.

The area where you notice the difference in color gamuts was Caribbean turquoise waters, but it's small. I think that for most purposes and most buyers sRGB works well enough and avoids dealing with color management hassles for users who don't care (because of products or browsers that just assume sRGB which displays an aRGB image looking really awful)

EDIT: - See post below. I made a mistake and exported as ProPhoto, not aRGB. What I say below is incorrect.

I have first had experience of making the mistake of exporting in Adobe RGB and having to correct this frustrating mistake.

The answer is that only a couple of sites do accept the format, but I know for a fact that Adobe themselves do not. HOWEVER, stock sites which don't support it will still show the image with the colour profile when it's for sale, but then sell it without...

If you upload an Adobe RGB image to a site which doesn't support it, a buyer will receive an image without the profile and the final image will look horrendous. I've had a couple of buyers contact me directly to say that the image they purchased online looks nothing like what they received.

I can't stress enough not to do this unless you want unhappy customers and refunds.

Quote from: cloudvisual on October 19, 2022, 05:28

I have first had experience of making the mistake of exporting in Adobe RGB and having to correct this frustrating mistake.

The answer is that only a couple of sites do accept the format, but I know for a fact that Adobe themselves do not. HOWEVER, stock sites which don't support it will still show the image with the colour profile when it's for sale, but then sell it without...

If you upload an Adobe RGB image to a site which doesn't support it, a buyer will receive an image without the profile and the final image will look horrendous. I've had a couple of buyers contact me directly to say that the image they purchased online looks nothing like what they received.

I can't stress enough not to do this unless you want unhappy customers and refunds.

I have submitted aRGB images to adobestock. I would hope they do the proper conversion if they sell the image with a different or no profile (in this case convert to sRGB). Hard to believe they just ignore color profiles.
I hope that's not the case.

I have had a look back based on what you're saying and I have made a mistake. I exported the images as ProPhoto, which I thought was the same as aRGB. My mistake - I haven't ever uploaded a photo as aRGB.