Marketing exaggeration. Yes, in the example both positions are in profit, but:

This won't always be the case. If the price trends in one direction, one of the positions will burn out or be hanging at a significant loss.

"Profit ×2" here was achieved because you were simultaneously trading volatility in both directions with a grid of orders, rather than through some miracle strategy.

Essentially, the schemes in the screenshot are not a universal method, but rather a game on the futures grid from both sides, which can yield profit with good volatility and successful order management. But it is extremely risky due to the ultra-high leverage and fees. For a beginner, it is a direct path to a quick loss of deposit.