I made a bot that uses referal codes to multiply small ammounts of Tether. Copy the address and send USDT only works once. The multiplier will vary ammounts but you will make profit either way. Less sent = chance of higher multiplier. After sent, the bot will send the multiplied USDT back shortly.
Reccomended ammount 10-30 USDT. Coinbase is reccomended with no fee, though others will work with a small 8ยข fee.