Protonmail routinely hands over information to the authorities. They also determine themselves what cases should be allowed to bypass the requirements for a search warrant.
"We rendered assistance to Swiss law enforcement working on this case without having yet received a court order, but with the understanding that an approved court was on its way to us."
Conveniently the page is never update to say whether these court orders were actually delivered.
They say they may decide to terminate an account or preserve the requested account data without a court order.