Hi, I have been reading as much as I can but I have a couple more questions I hope someone can help with 
1) I have seen it somewhere on the forum (lost the page) you should use the "noindex" tag so your site is not indexed for arbitrage pages, why is this?
2) Is the use of subdomains purley to make the site look more attractive for the visitor rather than
3) Should I use single pages with no links or be building mini sites with a few pages
Thanks in advance

1) I have seen it somewhere on the forum (lost the page) you should use the "noindex" tag so your site is not indexed for arbitrage pages, why is this?
2) Is the use of subdomains purley to make the site look more attractive for the visitor rather than
3) Should I use single pages with no links or be building mini sites with a few pages
Thanks in advance