I used to work for a copy-cat that does really well so far. However, their main problem is that the majority of the turnover comes from a hand full of power use

I used to work for a copy-cat that does really well so far. However, their main problem is that the majority of the turnover comes from a hand full of power users. Most users behave like described here. Pay 10 bucks once, lose them all and never look back again. Attracting customers in the long run is hard for this business model.