I intend to hold a minigame for my customers (they are mainly in crypto markets), so which one do you think they will prefer? $20 to their own bank account or a $20 gift card to buy products in some reputable website like Amazon or Ebay?
You give general information so it is different about the nature of your customers if they know cryptos, it is better to give them some currencies as gifts where they can then buy gifts or transfer to the bank.
If they are not experienced, it is best to give cards or vouchers.
Is this related to your LinkedIn page/ KYC services?