Sign up on Binance with HedraBack
Register through the HedraBack link so Binance records your account under HedraBack from day one.
Open the HedraBack link for Binance (new tab). Use a private window if another code was used on this device before.
In the referral / invitation field, check that the code is HEDRABACK. Don't finish if it's empty or different.
Complete registration and identity verification on Binance's own site. HedraBack never asks for your password or 2FA codes.
Trade as usual. Rebates follow the rate and payout shown on the Binance page.