An airdrop is a way of distributing tokens between users who perform certain actions or participate in a promotion.
In order to receive tokens via airdrop, users must do simple actions related to social networks. This could be subscribing to the official channels of the project, publishing information about the project, reposting, liking and inviting other people to join the project.
The project announces the conditions of the airdrop in advance, such as the number of awards and participants. The reward may be the same for all participants or depend on the number of participants. Since airdrop activities are not complicated and there are many participants, the rewards are usually small.
A retrodrop is a type of airdrop that gives a reward in tokens to those users who have been with the project from the very beginning. Unlike a regular airdrop, where users simply take actions. Retrodrop rewards early users for their activity in the project.
It is important to understand that users cannot know in advance whether the project will make a drop or not. Only some projects provide reward hints on their social networks. The conditions under which the drop will be issued are also unknown. Therefore, users receive tokens as a surprise, without having any information in advance. Considering that retrodrop participants do not know the exact conditions and size of the rewards, there are much larger rewards there.
A striking example of a retrodrop is Arbitrum. We are also waiting for retrodrops from ZkSync, Starknet, Layer0
