The aim would be to deliver the same speed via the API as we do via the site; not restrict it to the typical 1 bet per second.
There is no reason to use API anymore if the speed of the API will be the same as the site. Using API should provide faster rolling speed than using the site's bot that is why people choose to use API rather than using the on site's bot. If you couldnt deliver a faster speed with APi then you should probably not do it anymore
One of the most reason to use the dice site API is to provide control the setting of bets: when to stop, how many bets you want, timer for what time you need to start/end the bets, better strategy, and instead of auto-bet feature in the site that lack of control and speed.