Adopt a star from a non-profit and support scientific research
A non-profit alternative: Many private companies offer to "sell" you a star name for $19.95, but here you can adopt a star that might host a planetary system for just $10! The Pale Blue Dot project is hosted by a non-profit organisation (White Dwarf Research Corporation) and 100% of the proceeds are used to support scientific research on the stars that you actually adopt.
i have my doubts on this. While it does seem at first to be a good idea to generate funding; the bottom line is that the ethics are debatable, and that the exact nature of what they are 'researching' is suspect.