[iso1631]

They stopped people with cleared credit from buying stock

[MuffinFlavored]

because they themselves were swamped with 10,000 other users who did not have cleared credit who were buying the stock

[milesdyson_phd]

Every single Robinhood user could have had $5M in cash in their accounts and they still would have had to suspend purchasing shares. Brokerages cannot use client funds for depository requirements. Every purchase transaction required Robinhood to cover 100% with their own cash until settlement.