It has nothing to do with anime or cels : there
is programs that will collect address from 
messages posted in newsgroup, from web pages and 
so on. Then huge lists are made with all those 
emails and sold to people who want to use them.
People/companies doing that don't care what you 
are interested in. They don't even care if the 
addresses works. (In fact, they often fill the 
lists with randomly made addresses just to be 
able to sell a bigger list)

Cheers,
Yann Stettler