The Quarkchain ICO is using a lottery system to allocate its $4 million public sale cap due to being oversubscribed. To be eligible for the lottery, participants must score 60% or higher based on their contributions to the project's Telegram group, original content submissions by May 15th, and a quiz scheduled after the KYC deadline of March 20th. Those who score 60% or higher will be entered into the lottery, and those selected will be able to participate in the ICO. The project aims to solve blockchain bottlenecks and has an experienced team, contributing to its high demand.