I would also say there is a good chance that Thomas contract has guaranteed money in it.
Malcolm Thomas had a good Vegas summer league averaging 11 ppg and 15 rpg with Chicago. Bulls cut him later in July mostly because he would have cost them a lot of money with the luxury tax. After that, he didn't signed a training camp contract with another team and started his season in D-League. One could guess he turned down training camp invites because he wanted guaranteed money. I don't see him changing that stance after 2 stellar D-League games.
Realgm has him with a multiyear contract:
http://basketball.realgm.com/player/...s/Summary/2560
My guess for his contract is:
2013-2014: $702,233 (fully guaranteed)
2014-2015: $948,163 (fully unguaranteed with some guaranteed deadline(s) over the 2014 summer)