TV Evangelists

I was briefly reading the article "TV Networks Pursue the 'Super Fan'" and one phrase that caught my attention:

Johnson[...], not only watches a lot but also prides herself on spreading the word to get others to tune in. Johnson gives new meaning to the term TV evangelist, and lately reaching people like her has become the Holy Grail of network executives.

Whatever happened to the real evangelists? First Apple turns marketing into evangelism and now TV networks are turning word of mouth ads into evangelism. I guess once the "real" TV evangelists started getting black eyes, the word "evangelism" lost its sacredness....