A client has a website for a service and the service is free. The client wants to introduce a number of subscription schemes so that users can use premium features.
Question: how do we get users to buy features? Give them away for a couple weeks and then force an upgrade? Give them a choice at registration? Prompt at appropriate times during usage of the system “hey, did you know you can also do this for £xx”
Does anyone have a background in this and what advice can you offer? What works best? What did you learn?