I am a Catholic convert from the Lutheran Church-Missouri Synod as an adult; however, my family reared me in the pentecostal / charismatic movements. It appears to me that the following “enticements” draw people to these protestant churches.
(1) Entertainment. The music is more akin to a rock concert, both in sound and in expression. Many of the pastors are excellent public speakers that would rival the most masterful politicians.
(2) Marketing. Radio, TV, billboards … all across my part of the country (Texas and the southwest), these churches market their “product.” A church in Amarillo has received the annual award from the local advertising association several times.
(3) Psuedo-psychology. I won’t mention a particular pastor of a 25,000-member church in Houston; however, when the focus is always on “reaping the benefit of God’s promises” rather than on yielding to the Cross, people flock to it. It’s somewhat akin to what I call the “stock-market theory of Christianity” – and it is a travesty.
(4) No authority. This is at the heart of protestantism (in my opinion) in the good ole USA. People do not want other people telling them what something (the Bible) does or does not mean.
These are just some brief thoughts, based upon my own experiences and observations. I am working to change that though here in Dallas!