The point is that no team that you could consider outright "small market" has attempted to sign a player to a 100 million dollar contract this past five years.
Find me an instance where the Rays, Marlins (pre-2012), Padres, Pirates, Royals, Reds, A's, Diamondbacks or Guardians have reportedly offered a Free Agent 100 million or more to sign with them. The inability to do so is a large component of a team's "Small Market" moniker.