When I started using PL I asked this: about different looking jpg exports. and had the impression that no-one really knows what happens with the color profiles. For the export one can choose between “sRGB”, “AdobeRGB” and “Custom monitor profile”. Yesterday I found out that the latter two options look identical. The EXIF data says “undefined” for color profile, so it looks like “Custom monitor profile” is the same as “AdobeRGB”. This makes sense, because internally PL does indeed use AdobeRGB.
BUT: I am quite dissapointed that none of DXO staff could give an answer to this quite basic questions. Maybe I find some time to play with fake monitor profiles to find out, what happens, but it would be better if DXO could shed some lights on this topics.