Is there any reason that Jaikoz isn't mentioned anymore on the website of musicbrainz.org?
It was mentioned under the title "Tag Your Music" or in the menue -> Products.
The same is valid for SongKong.
Only MusicBrainz Picard, Magic MP3 Tagger and Yate Music Tagger is mentioned.
Its just because SongKong and Jaikoz no longer use the MusicBrainz webservice directly they use their own server. To use the the MusicBrainz webservice in a paid product there was need to be a member of the Tagger affiliate program and this payment includes listing on the MusicBrainz website, I now no longer need to be a member of this paid program.