same reason I just bought my 8th(?) copy of photoimpact first one around 2005(?). (two of those for other people's machines so they can use it without worrying about license failures or/and recurring billing)
I don't mind paying for a new license for each new box I want to use it on - because it still works on my xp machine, and each other one - with or without internet connectivity - no license check needed- it just works.