Some interesting tidbits here about the TFA supportive characters;
http://www.starwars7news.com/2015/09/new-official-databank-entries-for-characters-and-places-from-star-wars-the-force-awakens.html
It doesn't give much important new info however; except that the "Unkar's thugs" previously mentioned works for a junk dealer called Unkar Plutt, and that the Kanjiklub gang lead by Tasu Leech is apparently an "intergalactic criminal organization."