This is Erdem, legal responsible of SamyGO, community, founder,admin, etc...
Firstly, congratulations about your success on D series.
I believe ,as juuso sad, you have used information on SamyGO pages that includes program samples, wiki/forum pages.
So that means we helped you. All this information are free to everyone who wanted to reverse engineer their devices.
Please thing for a while, who helped us to build whole SamyGO information? Answer is no one. We build it.
So... If you want to sell your program, that build from our information, than you have to pay us about that information on this web site/forum/wiki/programs etc... that you actually used.
Fee is "opening your program's source". If you don't want to pay like this , we could also accept $ or ? but that amount will be > 100K?.
I think if you choose to pay with money, than you can't make any money from your business...
So it's cleaver that opening your source... I don't want to think otherwise...
You just make little step on D series. Please look at B series programs, scripts (like SamyGO Firmware Patcher, SamyGO Expansion pack...) etc and compare with your work...
Than you can understand what you made. Sooner or later, some one will make D series achievements under SamyGO and FREE. I believe this will also axe your sells.
If you think your work a value, please look at wxHexEditor. Free, open sourced > 12K code written by me fro humanity.
Also Meteorite, even there is no similar tool on world, I make it free and open sourced. I can sell that program for $30 easily. But I don't.
I believe you work on D series, spend your time but for what? For money or self enjoyment?
Selling such program could arise some license problem with Samsung and/or also SamyGO. My father is lawyer am I told this before?

If you want to work for money, please select sites like freelancer.com.
But selection of hacking Samsung D series for money is not good choose...
I advice you to choose open source way and also could join us...
We collect donations and spend for members/users who make significant work,
(like smartsmurf, hey we are still waiting DTS for B series!) you can see donor names and where those money goes from donors page...
I also thing about bounty offer for D series rooting but users doesn't look warm to this idea.
If you open the source, I believe I could give bounty (amount will be depending complexity/knowledge on your tool) for such a tool but this is clearly does not mean buy/sale of your program by SamyGO or anything... Just bounty..
So I advice you to think before you act.
Thank you for reverse engineer and risk your D series device.
With my best regards,
Erdem U. Altinyurt