+---------------------+--------------------------+-----------------------------------------+
|                     | Advantages               | Disadvantages                           |
+---------------------+--------------------------+-----------------------------------------+
| Airdrop pro rata    | - affects large numbers  | - does not target the user              |
|                     | of people very quickly   | - no commitment on the part of the user |
|                     | - sybil-proof            | - high cost for an automatic airdrop    |
|                     |                          | (about 50k$ of gas for the first        |
|                     |                          | 1,000,000 addresses on Ethereum)        |
+---------------------+--------------------------+-----------------------------------------+
| Interactive Airdrop | - targets the user       | linked to centralized third-party       |
|                     | - makes a commitment     | services (telegram, twitter, facebook)  |
|                     | on the part of the user  | - Sybil attack possible                 |
|                     | - little expense         |                                         |
+---------------------+--------------------------+-----------------------------------------+