I doubt it is his only incentive but I seem to recall that LT has his own plans / inventions in the works that he needs the diamond doping tech in order to develope.
Just had a look at LT's latest blog post from 10/19, and in the second half of the post he discusses some requests he has made to compensate him for his services (i.e. 1000 shares for every cent he raises the stock price). Seems like his demands play into the long term goals of CTDT.