One aspect is that it's a way for the founders get to take some money off the table. It's not prudent to have 99% of your wealth tied up in a single "cash cow"

One aspect is that it's a way for the founders get to take some money off the table. It's not prudent to have 99% of your wealth tied up in a single "cash cow" no matter how proven it is, you do want to diversify.