Thanks for your reply. Alfred Clipboard history option would come in handy. It stores info (if enabled) and maybe a script could read last xy entries and forward it as merged list to OS X clipboard. Sorry if this is confusing. For example, I assume when uploading image by image at the moment every link would be in clipboard history, and if batch upload could be possible OS X would record only the latest URL, but shouldn't Alfred remember all of them as if they if you hit CTRL-C X-number of times? Then a script could pull URLs from the list and merge it in single list when pasting - if 3 files were uploaded the script would read last 3 items from clipboard history and so on.
If this is too complicated, unintuitive or too bulky to add simply ignore it. I am not sure how useful this would be to most people and it is always best to keep things simple as possible.