You will start with 25 USDT that will be added directly to your account and you can use them to trade and you can keep all of your profit. Everything you make is yours to keep.
StormGain is a new crypto exchange that provides free demo trading for their users and it's suitable for beginners and advanced traders, they also offer leverage up to 100x, besides that they offer the lowest fees among other cryptocurrency exchanges. They've managed to sign a sponsorship with the famous English Premier League team called "Newcastle United" for the 2020 season.
Please note: StormGain don't accept traffic from the USA, Canada, Japan, Afghanistan, Bosnia and Herzegovina, Guyana, Iraq, Lao PDR, Yemen, Vanuatu, Uganda, Syria, Ethiopia, Sri Lanka, Trinidad and Tobago, Tunisia, Iran and North Korea.