A church web-site might use this approach. Whereas the same pages branded as by 'New life Solutions', 'Musicians Unlimited', or similar neutral names, may hold readers much longer. There are many interesting and effective evangelistic sites to study. Find ideas by assessing the different approaches used. There are many other exciting possibilities.
Online games are very popular.
Simple games can be a value-added option to encourage return visitors. Cartoons and humor can infiltrate truth past people's defenses. Comic stories also have great potential. Sites can offer help for specific health or emotional problems in a gently evangelistic way. An evangelistic web-site will generate email questions from readers, so you need a strategy to handle them.