I'm pretty sure the message actually just lists the others players whose generosity you've surpassed. For example, after using a total of 6 buckets, my message said:
"Your generosity has surpassed suuljin, Mr. Practical, Mike_Liviar, django, TeKRunneR, Dennis, Vholes Piper, Shrapnel, Betrayer, TheManStark, and Llamaman in our contest to see Emerald Gift live Halloween night!
Fundraising Bucket / Discussion
This is the discussion related to the wiki page Fundraising Bucket.