Do we have a deal?
that was checkmate
First off, I want to state that I don't think any strategy will yield a long term winning rate.
But I'd just like to give a few of my thoughts here.
I don't believe he ever guaranteed that if you bought the guide, you would automatically win 15 BTC. He even admits that there's a chance of busting and that he himself has busted using it as well.
He stated that he had won 15BTC which was verified by http://pd3.co/u/NicholasCra1 if he is indeed the same user as the one that shows in 'his' screenshot and that he was willing to sell a guide that showed exactly how he did it.
He did however claim that there was a 1 in 2200 chance that you would not reach 1.25BTC from a 2BTC bankroll which is impossible unless you are using exploits or cheating. <--- This is the lie right here.
Had he not claimed this, I think it would have been fine selling his guide to players as long as he was upfront with everything (that it wasn't a longterm winning strategy and that it was still subject to going bust) and that he gave out accurate numbers.
A lot of people play dice as a hobby and it would have been at least entertaining to see what new strategy someone has come up with (although anything more than a few mB is overpriced in my opinion).
TL;DR :
Cryptodigitals designed a spreadsheet and strategy that has won him 15BTC.
Cryptodigitals allegedly spent quite a few hours designing this spreadsheet and would like to sell it for his work.
You are not guaranteed to win this and are more likely to lose at a much higher rate than what Cryptodigital suggests.
IMO, you should only buy this for entertainment and hobby purposes only. Do not expect to get rich off this guide.