This thread's last reply is from April 7, 2009, 8:06 PM UTC. Software, malware, and removal-tool
advice below may be out of date — treat specific steps and download links with caution.
http://www.regiftable.com/regiftingrobinpopup.html
quite clever isn't it. I won't say how, don't want to spoil it

Easy, every time you do that the number becomes a multiple of nine.
30-3-0=27
15-5-1=9
So all multiples of nine on that board have the same 'gift'.