Primarily Green Dot moneypaks are used to load pre-paid credit cards. Such as the Green Dot credit cards, and other's as well. I use them to fund my Upside Visa and then I use the visa to deposit on poker sites. Other's will trade the value of the moneypak for pts and money on poker sites. You can buy them at most chain store pharmacies such as CVS, Walgreens, Rite-aid and convience stores too.