Transferred from notabug#5 - by @Niklink, 29 Dec 2021:

Audio Commentary with Robert J! Lake, Nick Smalley, and Hanna Nakamura

I'm actually not entirely authoritatively certain if it was packaged as a final bonus track on the album. It's been impossible to directly download HSGaiden albums for a long time now. Many downloads of the album, that DO include the other bonus tracks, do not include this track (example: https://archive.org/details/HomestuckForTheHolidays). It's not listed in Tagstuck. It wasn't listed in the Homestuck Wiki until August 2012 (during a time in which I myself was contributing to the wiki, I had added all the info about the Jailbreak Vol. 1 tracks the previous year, for example).

My own album download has an early 2012 last modified date for all files except for this one, which is dated last modified exactly one year later in 2013, to the day. The metadata lists Year as 2010, but I did mess around with the metadata on my Homestuck albums a lot. The filename for this track notably matches the typical Bandcamp download format: <Album Artist> - <Album> - <Track#> <Title>.ext and lists its track number as 23, while all the other songs in my download have had their filenames edited by Tagstuck.

My best guess is that it was added as a bonus track sometime AFTER the album's release, after the album had already been harvested and circulated through back channels (it was originally a paid album release, after all, with the proceeds going to charity).