An oligopoly is a market dominated by a small number of sellers. A compliant oligopoly is one where regulatory requirements — not product quality or consumer preference — determine who gets to sell. The PMTA process, with its $1-5 million per-product application cost, scientific data requirements, and multi-year review timeline, creates a regulatory moat that only well-capitalized companies can cross.

Here's the structural shift in three moves:

1. Legal track gets faster: The Trump administration's accelerated PMTA review process (reported by WSJ on September 23) speeds up approvals for companies already in the pipeline — predominantly Big Tobacco subsidiaries with the resources to submit applications.
2. Illegal track gets harder: Senator Schumer's 30-day FDA investigation demand, state ENDS directories (PA, VA), indoor vaping bans (AL), and customs seizures (Operation Red Mist) systematically target the 70% of the market that's unauthorized.
3. State track fragments compliance: Each state creates its own directory, registration, and enforcement regime, making national distribution of unauthorized products logistically impossible for all but the largest importers.

The result: the unauthorized market shrinks, the authorized market consolidates around a handful of companies, and the independent vape sector — small brands, craft e-liquid makers, independent retailers — gets caught in the middle.