Updated Joplin lately, and checked settings. In the past Joplin accessed only my cloud drive and github (when opening settings or checking for updates). To my surprise, the new version of Joplin (stable 2.4.12) tries to open new sites - no changes in my settings ! There may be good reasons, yet any user unable or unwilling to review public code will necessarily wonder : are these requests to the sites listed below really needed, since Joplin worked before ?
cwl.cc
The real URL works cdn.jsdelivr.net, the URL posted in the OP is incorrect - jsdelivery.net and does come up as for sale - (note that cdn is required and jsdelivr has been misspelt).
I was under the impression that the original list came from scanning outgoing/incoming connections (and thought maybe something funky was going on with jsdelivr). But indeed, a typo does make the most sense.