The fact that not everybody is staking should not increase reward over time - it should just mean that the maximum supply will be reached later....

But my question adressed the fact that I couldn't find an account for which your claim (1/600) is valid over an extended period of time (say since August 1.). All accounts received clearly LESS than 1/730 - so you would either have to be a special case OR your looking at a to narrow time window...(without knowing which ECA-Adress we are talking about, I can't check... )