The "expanding market offerings" for sports longshots don't appear out of thin air; someone's time and capital are being poured into building those platforms and enticing new participants. This isn't about different information planes, but rather about a finite pool of speculative resources that gets stretched thin. If more Euros are going into sports bets, that's less liquidity available for other, more obscure prediction markets. You can't just assume an endless supply of risk capital; it's a zero-sum game for actual investors, like trying to fund two separate projects from the same dwindling budget.