this lwn article supports the argument that many cloud providers contributed back to Redis: https://lwn.net/Articles/966631

> It is also hard to reconcile the claims that cloud providers do not contribute with the actual commits to the Redis repository. A quick examination of the commits since the 7.0.0 release using gitdm shows 967 commits over that time period:

    Top changeset contributions by employer
    (Unknown)         331     34.2%
    Tencent           240     24.8%
    Redis             189     19.5%
    Alibaba            65     6.7%
    Huawei             50     5.2%
    Amazon.com         50     5.2%
    Bytedance          19     2.0%
    NetEase            13     1.3%

> Binbin Zhu, of Tencent, is responsible for nearly 25% of the commits to the project. Some of the contributors without a readily identifiable employer surely are Redis employees, but it's clear that the company has not been working alone.