It is important that you communicate to them regularly until they respond to you. It is important to get their attention so feed them the basic information about the SFI program. There are people who sign up just to look around and leave. What's good about the SFI program, you don't lose them. SFI provides a way to connect to them.
It is also good if you can send friendly email messages to them once in a while. It is important also to make them feel at ease with you.
It is hard to give an exact formula for this since people are not the same most especially regarding personality. I mean, some don't get annoyed even if you email them regularly but some do. Sometimes, it really depends but what's important is that you get across the valuable information about SFI. Talk about the benefits they can get if they continue with the program.
It is important that you communicate to them regularly until they respond to you. It is important to get their attention so feed them the basic information about the SFI program. There are people who sign up just to look around and leave. What's good about the SFI program, you don't lose them. SFI provides a way to connect to them.
It is also good if you can send friendly email messages to them once in a while. It is important also to make them feel at ease with you.