Can this be true or are they just trying to play on my intelligence? Let me tell you, yesterday I was browsing the internet when something popped up as a notification on my phone, and when I checked, it turned out to be about getting 1 free ETH for just buying ETH. I thought it was just a marketing tactic until I went to the exchange that talked about it and I saw the same.
Remember that 1 ETH is now $4,300. Do you think they're so generous to that extent to give people rewards for just buying, either on spot trading, copy trading, or simple deposits? Anyone of these is allowed in order to get a good reward.
Nothing is free and no one will give you a single penny for free for any reason. If you click on any link in the message that came to your phone and use any login credentials there, your entire device or any specific account will be hacked. This is phishing. Hackers have sent such messages to hack your device. Hackers always lure people and hack their valuable information. So be careful of these and always avoid such messages, otherwise your device can be hacked at any time.