According to @EmberCN, the $RIVER airdrop is live via the official portal and uses a Dynamic Airdrop Conversion mechanism where the claimable amount increases over time, with a maximum window of 180 days; claiming on day 180 yields 270 times the amount of day 1, and participants must choose their optimal claim time based on this schedule, source: @EmberCN on X; River Inc on X. According to @EmberCN, the mechanism’s time-based multiplier directly impacts token quantity at claim and therefore the effective entry size for traders considering when to realize their allocation, source: @EmberCN on X; River Inc on X.