The deadlift and its variations maximally load the glutes more in the bottom range of the exercise. Adding the band around your waist allows you to load the portion of the ROM where you don't get as much work – the top.
Band Waist-Resisted RDL
To make these more effective at hitting the top of the range of motion, place the band below your hip bones instead of around your waist. This prevents it from rolling up as you hinge, and it gives you more direct tension in-line with your glutes to drive your hips forward. This increases the demand on the glutes at the top.
Note: I'm using an NT Loop instead of a traditional latex band. These bands are far more comfortable and stable.
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