Was there a press release before they sold their bags in the market? How did they release the 333 million XRP? Did they sell it in Poloniex or some other exchange? Did they sell it over the counter to a whole sale buyer? Those details should be known by the community.
Maybe they did it to raise their market cap because Monero is gaining on them. What are they going to do next release more in the market to raise it to a billion? Because that is where Monero is going.