So the $1m giveaway is also a scam?
Maybe, maybe not.
Have you read the T&C's?
3.3. The prizes will be credited in Bitcoin (BTC) to your Prime XBT activated account. If your position is 1-10, your account will be activated automatically without any additional requirements, if your position is 11-10000, you must activate your account before claiming the prize. To claim the funds you must submit a ticket to Prime XBT support.
3.4. To activate your account you must deposit at least 100% equivalent of the prize and complete 20 trades each valued 100x of the amount credited (for example if you won $400 you must deposit $400, complete 20 trades with 100x leverage and then claim and withdraw the prize).