I can't find much more information about this out there then this reddit post.
https://www.reddit.com/r/binance/comments/cuo9rt/binance_ravencoin_issue_24_hours_in/Ravencoin is being suspended temporarily due to maintenance.
As you may or may not have noticed yesterday, our service provided, Amazon Web Services (AWS), was experiencing issues for some time. This had adverse effects on several of our systems, for which the impact was greater than expected.
No, it does not happen frequently, and this particular issue was largely out of our hands. Wallets do occasionally require maintenance, but this holds true for any reputable exchange to ensure that user funds are not at risk for deposits/withdrawals. You will receive your deposit once the maintenance window closes on the wallet, which we are working to complete as soon as possible
