usablake
Not sure how everyone is on security and safeguarding everything but there's a phishing website right now that looks identical to this one. Literally. Identical.
This is it: SCAM olympusdao . io SCAM
If you go to this website and try to connect your metamask wallet it will ask you for your seed phrase. If any of you went here by mistake and actually did that, this would explain why your wallet got drained. Unless it's the actual devs stealing these coins out of your wallets the only other way for someone to do it is if they have your seed, restore your wallet on another device (they probably have your password too, metamask is a hot wallet) and sign the transactions pulling your funds.
Just a friendly tip for anyone reading. You'll see the sites are identical so it would be really easy to make that mistake. It's the second Google result for olympusdao. Hope this helps.