The assessment is based on direct, authoritative evidence from the primary source. The most relevant and authoritative source provided is the official Polymarket aggregation page for all 'Lighter' related prediction markets. This page explicitly states a total trading volume of '$18m Vol.' ($18 million). Since $18 million is significantly greater than the $10.71 million specified in the statement, this source directly and strongly supports the claim.Supporting sources confirm the existence and significance of the Lighter airdrop betting market on the platform. For instance, one specific market on the airdrop's date shows a trading volume of over $974,000, which is a component of the larger total. No sources contradict the primary evidence. The other sources are either irrelevant, lack specific figures, or show negligible volume on minor or inactive sub-markets, which does not discredit the high total volume reported on the main aggregation page. Therefore, the evidence overwhelmingly indicates the statement is true.