The word bonus is subjective - so at the end of the day its all about the price at which the options are issued that will determine whether they actually are a 'bonus' or not.
The things that determine an option's value are:
* expiry date
* strike (exercise) price
* volatility of the underlying stock
What, as you understand it, is the offer in relation to the bonus options - how do you get them and how many do you get?
Also do you currently have shares? Or do you currently only have options? If you currently have options - what is the exercise price and the expiry date?