Supply the hashes and the money, and we'll pin them until the money runs out. Additional money can be supplied at any time. Note that we start counting time as soon as we issue the pin command, so factor in download time.
Our current rates are $2 per Terabyte-hour ( which is $0.14 per gigabyte month, if you prefer those units). We divide your payment by that cost and then by the total size of your requested pin in order to come up with how long to pin for. Additional time can be purchased in the same way.
The status of individual hashes can be viewed by constructing a URL like https://pinbits.io/status/<hash>
Enter the hashes you wish to pin: