SEO: subdomain vs subdir

Anyone has coment on the following?------------

BUT is there really no bad effect on using subdomains???????? If that is true, why should people still spend money on registering domain name if they want to run a "network of sites".............. for example, if one want to run a celebrity network of site......... then it would be saving lots of money if I do following:

I register a domain.......... mycelebritynetworksites.com, then I use subdomain to do

celebrityaaa.mycelebritynetworksites.com
celebrityaab.mycelebritynetworksites.com
celebrityaac.mycelebritynetworksites.com
.......


Welcome you comment please, thanks

 

I would use a subdomain for a small site that I don't want to fully develop. It can help build name recognition and traffic to the main site. Otherwise use a new domain.

 

I see no reason why not if its a network of sites you own. ... of course depends how small of NICHE you want.. Is it worth your time? But a maby a small 3-4 letter domain would be better like.
parishilton.star.com or
rollingstones.a1z.com etc

Also those small domains are reged up already unless you search for awhile.. or buy one on sedo. Nevertheless Still remember Subs are a new site. So they won't carry on backlinks/PR from your Top level domain. you will have to pull alot of work to all over again to build the back linke