Every link is as good as it's backlink. Building other sites for the purpose of driving inbound links creates the problem of having to create backlinks for the sites in your backlink, resulting in less link juice flowing to your main site as it first has to flow through the splog.
So now we have two method, method one, integrate all the unique contents into one site and there is internal link from unique contents to other internal pages; Method two, we put some unique contents into A, and link some unique contents in site A to site B, our main porpose is to promote site B.
So, which method is better? Internal link better or external link better? Which stategy is better? Thanks.
consider this - most webmasters have no interest in doing recp linking, not that its a bad thing but the almighty has scared webmasters into doing recps so you have to consider other ways of doing these exchanges.
Having more sites within your control will help that - not unless you believe webmasters will just link to your site because it has great content
Availability of reciprocal links will vary according to the field that you are in.
In general merchandise retailing it seems negligable and is difficult to justify. In the music business linking is an essential element - bands, venues, record companies, agents and magazines all cross link. Other business may fall in any point in between.