Mint an owl, buy one on the secondary, and the Crypt hands you tickets. Spend them on the machine they belong to. Every mint from #2600 also becomes an entry in the Milestone Draw, which the Keeper runs when the Crypt hits a marker.
Fed by mint tickets only. One ticket for every owl you mint in an open window.
Fed by secondary tickets only. One ticket for every qualifying purchase on the open market.
Not a machine and not for sale. Every mint from the marker onward is one entry. When the Crypt reaches a milestone the Keeper draws the prizes, one at a time, and a winning entry is struck off for good.
Every wallet holding tickets, and how many pulls that buys. Mint and secondary are counted separately because they are never interchangeable.