@Stealx Your previous comment is dead for some reason. Re-posting it below:
"To date we've been selling IT training courses on DVD's for approximately $400 a piece. We create the curriculum, create the content, market it ourselves, everything.
We've sold almost $35 million dollars of our own IT training one course at a time to about 50,000 customers in 147 countries. Being in business for a number of years we've built up expenses to over $500k monthly and we're risking it all to start from 0 subscribers with the subscription model.
Completely bootstrapped, no outside money."
Are you offering previous customers who purchased at least one IT training course a subscription discount? It seems that would guarantee an immediate early seed base for subscriptions, even if they are at a discount.