I was curious to see what the monthly contribution pattern was for both Elasticsearch and OpenSearch and this is was what I got:

       repo    |  month  | commits | authors 
   ------------+---------+---------+---------
    elastic    | 2022-02 |     195 |      66
    elastic    | 2022-01 |     269 |      68
    elastic    | 2021-12 |     194 |      64
    elastic    | 2021-11 |     233 |      59
    elastic    | 2021-10 |     435 |      74
    elastic    | 2021-09 |     318 |      64
    elastic    | 2021-08 |      49 |      30
    opensearch | 2022-02 |      18 |      11
    opensearch | 2022-01 |      34 |      17
    opensearch | 2021-12 |      32 |      10
    opensearch | 2021-11 |      19 |      13
    opensearch | 2021-10 |      28 |      12
    opensearch | 2021-09 |      20 |      10
    opensearch | 2021-08 |       3 |       3

It seems like the contribution for Elasticsearch hasn't drastically changed that much (if any really), but what is interesting is contributions for OpenSearch has been increasing.