Although Sashi Brown developed an enormous war chest of salary cap dollars and stockpiled draft picks for the Cleveland Browns, much of that was spent in the John Dorsey era, leaving the Browns without the extra picks they have gotten used to in previous years. In addition, the salary cap was overspent in 2019, though the team is overall in good shape, salary-cap-wise.
The basic technique for building through the draft is simple. A rebuilding team realizes that there are a handful of teams willing to overpay to get extra draft picks now.