When contestants competed in the BB Basement competition, it gave them more opportunities to win powers to help their individual games. In the end, David Alexander, Christmas Abbott, and Dani Briones won powers from the BB Basement competition. And of those three, David probably needed the help the most. Did it help his entire game? With a dominant alliance still in the house, not likely.
Christmas won the Blocker Power. It gave her the ability to prevent a houseguest from being named as a replacement nominee for eviction in any of the three Veto meetings from the time she received it. Unfortunately, she never used it, likely because she never needed to, as she had been sitting pretty in a power alliance for weeks.
Dani won the Replay Power, which was meant to allow an outgoing Head of Household to play in the following HOH competition. They are usually barred from being able to compete, so this was a pretty sweet deal. She activated her power to allow Memphis Garrett to play in the HOH competition. Cody Calafiore ended up winning, but in either instance, someone who Dani is aligned with would have been in power anyway.
David won and used the Disruptor Power. It allowed him to secretly save one of the nominees for eviction, and he used it to save himself. Afterward, he played it off like he didn't use the power, which was totally unnecessary. But of all three victors in the BB Basement competition, David legitimately needed that help the most.