Sorry, I was trying to save space in an already too long post. Some of them simply took the evangelical model; some were started by people who had been Christians for awhile and then drifted. They have consistently modelled themselves on evangelicals, but with a series of Buddhic twists --for example, in place of voices or laying on of hands or possession, they have hours of highspeed chanting; they also do a lot with "sacred unchallengeable texts" (The Lotus Sutra) etc. (Mainstream Buddhists don't consider their texts sacred, only revered).
yours, Peter T.