Not sure, haven't put much thought into it. I don't know enough yet about how to package up postures and many that I have saved when I add them on other characters I might have to rotate or change the heights to get them back into position. Mostly I have been wanting to build up my database of postures to work on a game concept I slowly have brewing. I might add them to my patreon that I did a bunch of yoga poses for HS2.
The way to package Poses is like this (simple example), you have to make the pose on a Genesis 8 Male/Female, Base figure, with no morphs, just as it comes when you load it. The Only Thing you can do is 'Custom Colour' the Figure, Usually done as Blue for G8M, Red for G8F. If you have 'Props' within the Pose, like chairs or beds, change the 'Prop' to a simple square cube, unless your making the 'Pose' for Specific Items, then use that 'Prop'. Use simple lighting, and a plain background colour. Save each pose as you go along as a .duf file & Image, Named & Numbered them the same other than putting an M or F at the end,
So something like this ''XXXXG8 001F'' or ''XXXXG8 001M'' for a sitting pose. You'd then need to do the same thing for Genesis8.1M/F only changing the 'pose name' to ''XXXXG8.1 001F'' or ''XXXXG8.1 001M''. There is a way that 'Poses' need to be packaged for exporting to a simple Zip File, containing a Content Folder with Data, People Folder's for each G8M, G8F, G8.1M & G8.1F Poses so it should be a Data Folder & a G8 Folder containing both G8f & M Folders, & a G8.1 folder containing G8.1F & M Folders. Check it loads okay by Deleting the poses within Daz Studio, & Install them from your .zip file, or share out 5 or 6 copies here with people you know or ask for 'Victims.....Eeerrr Volunteers' to try out your pack of poses, from your Copied Master Zip file, then wait for the replies that 'xxy' doesn't work or a thumbs up that it does work properly.
The reason you use a 'Basic G8M or F' is that it should work across any G8 figure, with a minimum of adjustments for more extreme morphs. There are several Forum Threads in the Daz Forums on how to package poses, & probably a Thread or two here as well. As for ways to Sell your Poses, it's best to start with some Free Sets, you need to get a name for yourself as a 'Maker of Great Poses' before you offer bigger sets for sale....Start of with Renderosity's Free Downloads, or RenderHub, Deviantart, Patreon accounts. Once you've got a name for yourself you can move to being a Vendor/Seller & asking for Money for them.