Unfortunately a lot of church members view church as "life insurance" or "disaster insurance" instead of learning lessons for how to live a productive and properous life. With each new passing decade, century, or millennium followers start to doubt the world is going to come to an end (in their lifetime). If someone no longer believes they need "insurance" they cancel it. People who turn to God due to fear rather love aren't likely continue to go to church when "the end" doesn't appear to be (imminent). As far as anyone knows "the end times" could be in 5000 A.D. or beyond.
Churches that seem to continue to grow are the ones who have stopped selling fear as the motivation for welcoming god into one's life. Instead of dwelling on "the end times", hell, and damnation they are preaching that God is the father and owns everything and if you (his children) follow his guidelines you will live life more abundantly. The key is to sell people on a better way of life and not simply tell them to endure until the afterlife. Focus on teaching people how to live rather than how to die and you will hold their attention much longer. - One man's opinion! :-)
Luke 18:29-30 (New King James Version)
29 So He said to them, “Assuredly, I say to you, there is no one who has left house or parents or brothers or wife or children, for the sake of the kingdom of God,
30 who shall not receive many times more (in this present time), and in the age to come eternal life.”