Will profit be a percentage (%) of my staked USDT?

No. We cannot promise you a fixed percentage (%). This is not possible. Your profit will be based on market movements and on the opportunity SALDA finds for you.

Explanation

SALDA makes buy and sell operations on your behalf. The profit, when and if made, will be a certain amount, but not a fixed percentage of what you stake. Sometimes the amount will be X*, some other times it will be Y*, or even Z*, but never fixed. 

P.S.: If SALDA posts the same amount of profit day after day, it still doesn't mean that the amount is fixed. It will be a mere coincidence.

* a symbol representing an unknown value in USDT.