They don't talk about them because they aren't effective.
also, please don't come on here insulting people's intelligence, we know the bulk of these churches, especially mega churches money comes from tithes and offerings.
USE THIS INTELLIGENCE AND GIVE ME NUMBERS. ALL OF THOSE MEGA CHURCHES MAINTAIN 501 C3 CHARITY STATUS. THAT MEANS THEIR BOOKS ARE MADE PUBLIC FOR ANYONE TO SEE. IF YOU HAD KNOWN THIS YOU WOULDN'T BE SPOUTING NONSENSE.