OP sent me a vouch copy which I checked out. It's not a book or anything, just a piece of knowledge really. That being said, it does deliver everything that OP has said it would. It is a way to sell Starbucks gift cards for up to 80% of the value. It is very important that you have legitimate gift cards or if it's carded or illegally obtained at least make sure that it will last more than a couple days, because it does take 1-2 days to get your BTC. You also have to link your personal social media account so don't try anything that risky, but I'm not sure there's really anything that can be done to recover the funds if you were to provide a bad card (though I'm not sure you'd be welcomed back). In conclusion, this is a sustainable way to turn your starbucks into BTC at a profit, just find yourself a good supplier. Some of you may already know of this way, but I did not, so this was actually very useful knowledge to me and I already have started using it to turn a profit on some of my other cards. It's simple, but OP did deliver a method that I did not know before. Worth a few bucks