Ryan Daniel Moran argues you should launch one product at a time, not multiple. It takes 30 to 90 days for a new product to build enough awareness for repeat purchases. Trying to launch several at once usually fails because you can't do any of them well.
Theoretically, you could launch multiple products at the same time. I have seen people do it, but I don't think it's a good idea. Even in my businesses that are established that have 15 products and a list of 25,000 people, people who have bought things from us in the past, even businesses that I advise that have hundreds of thousands of customers, I very rarely recommend that they launch more than one product at the same time because I'm yet to see an example of someone doing it well. It takes a good 30 to 90 days to get a product into enough awareness to where you have repeat customers and you have your existing customers coming back and buying the product that you launched.
