As per [this meta.SO post](http://meta.stackoverflow.com/questions/79742/are-the-new-moderator-flag-limits-sufficiently-high/80117#80117), the flag count is calculated as:

> - default 10 per day
> - one bonus flag per 2000 reputation
> - one bonus flag per 20 "flag weight" above the default
> - maximum 100

"Flag weight", although it [has been removed from the UI](http://meta.stackoverflow.com/questions/119715/what-happened-to-flag-weight), still exists in the backend. It's calculated as such:


> - start at 100
> - +10 for a flagged post (+5 for a comment) that we did something about (or was basically valid)
> - -10 for a flagged post (-5 for a comment) that we suppressed as invalid
> - min 0, max 750 (but non-linear above 500)
> - **IMPORTANT CHANGE** - if you flag so consistently badly that you reach 0 weight, flags will be suppressed

Therefore, if your flag weight has risen way beyond 100, you already get many new flags every day. :)