Guardian Data Systems Wants To Be The PayPal For Pot

But weed entrepreneurs in the now 18 states where medicinal cannabis is legal are struggling to expand, weighed down by the fact that most banks and credit card companies refuse to deal with dealers. Enter Lance Ott, a cancer survivor and founder of the financial consulting firm Guardian Data Systems, which launched a service last year that lets people buy medical marijuana from dispensaries online using a credit or debit card.