I have a very successful ecommerce website that generates a lot of revenue and organic traffic. My business model has changed and I'd like to follow on the success of this website and branch out into selling other related products and services. However I'm unsure as to whether to create a brand new website using a similar naming structure as my current site, i.e. brandnameservice1.com or create an umbrella site for my brand and have all the products and services living on sub directories, i.e. brandname.com/service1, /service2, /service3 etc
Aside from the implications of doing a 301 migration what would this mean for ranking the future services over having them on dedicated domains?