Probably not great. The understanding is that having keywords in the URL is valuable. This makes sense since these locations are "more expensive" so if the keyword is there it must actually be relevant. So it would make sense to weight keywords found in the following locations in decreasing value:

1. Public Suffix Domain (costs money to register).

2. Subdomain (255 char limit in domains)

3. URL (generally URLs aren't too long)

4. Content (basically free to stuff keywords into).