StumbleUpon can bring huge visitor traffic towards your blog or site from 100 to 8,000 per day. Imagine if you can convert these visitors into subscribers. It is a fact that your blog feed subscription spike will increase but it will experience a decrease gradually with time. Your goal should be to retain these subscribers and make them a part of your community. There are no fixed set of rules but here are some methods which will convert visitors from StumbleUpon into subscribers.