system
3
Well, it is really just for statistical purposes and for our internal use - we like to know who our users are. Of course, there are some people which fill there a complete nonsense data (even the email, in which case they will not receive the license key) but you will be surprised how many people enter the real stuff there
!
The data are stored safely and are not misused in any way - we will definitely not call you. If you do not feel comfortable with entering your address/phone, do not do it. But please fill at least the city/country with correct info 
thanks
Pavel