My question for you today is: does your business run on clients or customers? The difference is that a customer is somebody who buys from you once, that is the only relationship you have with that person. This was my marketing strategy for years. Launch a product, they pay, and then I never speak to them again. You should not market that way. You need to blur the line between a client and a customer and never stop selling to them.

After people buy from you, get them on a mailing list...