There are hundreds of dead stocks (aka shells) whose tickers are valid that still trade. I even track some of those I follow on a board I created for that purpose and RMTD is one of them.
Eventually, some of them are pulled by Finra and there spirits can finally go to that big private trading platform in the sky.
You can lead a horse to water. But you can't make him get down on one knee and do an Al Jolson impression!