You are purchasing EMB tokens for .00004 BTC (or other currency equivalent to roughly $0.1/each. Each Ember token is a seat license within the Embermine Platform and a token is required to pay for your USERid which is forged to that particular seat license. So each time a USERid gets created in the Embermine Platform, that token is removed from circulation.
Learn more: www.embermine.com
Learn about our Seat License Contracts: https://embermine.com/embermines-seat-license-contracts/