FWIW, Robinhood posted a statement on their blog[1].
Two snippets:
>In light of recent volatility, we are restricting transactions for certain securities to position closing only, including $AMC, $BB, $BBBY, $EXPR, $GME, $KOSS, $NAKD and $NOK.
Also:
>We fundamentally believe that everyone should have access to financial markets.
Cognitive dissonance to the hilt :)
[1]https://blog.robinhood.com/news/2021/1/28/keeping-customers-...