Compare what you see and hear with the ways and message of the prophets and apostles. They did not hopscotch through the scriptures looking for something to fit their catchy topics. The ways of the prophets and apostles were very simple. They simply expounded the scriptures and left it at that. We live in a day of manipulating gimmick gospels.
Every religious crowd has it's own gimmick and trick.
The emphasis is on the invitation, not the message. Most preachers would feel very well preaching from Readers Digest if by some hook, crook, or trick they could only manage to get some poor sucker down to the front of the church at the conclusion of the meeting. You will search the scripture in vain to find anything that resembles the Invitation System employed by those who mask themselves as preachers of the Gospel in our day. No, he spent about eight minutes expounding texts from the Old Testament and the power of God fell. For your soul's sake, do not be as obstinate as the people were in the day that the prophet spoke those words and say as they did.