0% change op can garuntee the lifespan of this method.
NO one should expect this to last a few months if it is legitimate.
1st: Does op have a history of selling quality methods/products?
2nd: Even so, the first method was patched within a month or two of coming public, what makes this method so special you believe a multi-million dollar organization will not notice and rectify the situation?
3rd: Under what circumstances can you even BEGIN to garuntee ANY type of lifespan of such a method.
I am posting this so you guys don't get overly excited. Don't pay for the method outside of a legitimately created sales thread that has been VOUCHED by staff or high profile users. Secondly: Do not expect it to last, bottom line is it probably won't.
In fact ** THIS USER HAS NEVER HAD A SHOP ON THIS SITE. Only marketplace talks and freebies for web-hosting. I would tread carefully until any of this can be verified.