Robinhood blocked its users from buying or opening new positions in GME. But allowed selling. From the outside, it appears to be a coordinated effort to drive the price down to protect the overgeneralized billionaire hedge owners. The CEO of Robinhood did interviews to 'explain' why they did it, but it was really just a word salad of an explanation.
CORRECTION: "60% of its users owned GME at the time." appears to have been incorrectly reported and since corrected.
60% of RH users owning GME is false (or if they do, it's indirectly through ETF's that they can still sell). This was misreporting and corrected by the original reporter.
CORRECTION: "60% of its users owned GME at the time." appears to have been incorrectly reported and since corrected.