It is not just African American ‘preachers’ who suffer from this (and their congregations). one need only look to Oral Roberts, Jim Bakker, The Crouches ( to name a few) to see that this notion has been pushed for all too long.
I still remember one time hearing Oral Roberts talking about tithing and he likened God to a Coke machine. Oral said he put money in the Coke machine and he got a Coke in return. He gave the church (notice not God but the church) money and he got money back from God as a blessing.
I shook my head and never listened again
Very few teach from the Bible. There is on guy, MM, on tv. When I come across him I quickly change the channel.