If you got a discord message that says you won free BTC on ownerbit.com or olkbit.com then beware – it is a SCAM. They want you to deposit some amount of bitcoin to be able to withdraw the money you won. They have actually deleted the ownerbit.com site already (you can look it up on wayback machine) and they will probably delete the olkbit.com site at some point too. They both look like the whitebit.com website, which is a legit company registered in Estonia. If you got a message for a different site, then check if it looks like the whitebit.com website. I got discord messages for both sites: ownerbit and olkbit.