I was pondering what is better from a marketing perspective:

newproduct.domain.com
or
www.domain.com/newproduct

(as an example)

I think the world is starting to get used to 2nd level domains such that marketing something as newproduct.domain.com is mnemonic. I think 2nd level domains are easier to speak as well. They are also a hair more concise.

On the other hand, I think brands too often use too many domains when they should focus on marketing a single domain all the time. CNN does this, for example. The only domain they market is cnn.com.

I think a lot of companies grab every possible domain as a defensive strategy and that might be valuable in some respects but in general I think leads to defocus.

What do you think?