The gap for https://twitter.com/googuns_staging is 5 minutes; that account was started the same date as @googuns_prod: 28 July 2009.

I would guess googuns_prod is the output from two of whatever googuns_staging is, running at a 1-minute offset, with each thing identifying itself with the last nine digits: 200000000 and 350000000 for the production thing, ba0000000 for the staging thing.