And the upgrade check result doesn't seem to make much sense:
http://api.kobobooks.com/1.0/Upgrade...76/Kobo/0.0/N0
{"UpgradeType":2,"UpgradeURL":"http://download.kobobooks.com/firmwares/kobo7/May2018/kobo-update-4.8.zip","ReleaseNoteURL":"http://api.kobobooks.com/1.0/ReleaseNotes/1","Data":null}
It returns the update URL for 4.8.10956, which is older than the version shipped on the device ... No known affiliate (every one I know about) or original version (I usually use 0.0 to get the latest update, but I tried with every version) seems to return 4.8.11090.