I don't know if the Milespy folks will make any money - but it seems a little ridiculous to accuse them of ripping people off.
I don't see them charging $5.00 for a glass of water during a drought - they are offering something at a fair price that happens to be more than what they paid.
I think we call that a business. The only businesses I know of that sell things for below what they paid are called bankrupt dot coms.
I hope that they share with us whether or not this proved to be worthwhile.