As a native speaker, it's probably a distinction without a difference. Both sound more harsh than regular suspension and both sound less harsh than permanently

As a native speaker, it's probably a distinction without a difference. Both sound more harsh than regular suspension and both sound less harsh than permanently banned. Neither one tells you exactly what they've done in terms of the amount of effort required to re-instate him if they change their mind. Both signal that they're unlikely to change their minds any time soon. With a physical location, "banned" sometimes implies they've been declared a persona non grata, and the police will be called if they return. Clearly that doesn't apply to an online platform.