15MB is a LOT of data. Imagine 15 million characters X number of sites available on the Internet...

You can manually find many guest post sites. I also do that. You can use advance search operators: allinurl:writeforus your niche allinurl:guestpost your niche allintext:...

Yes. The same company can rank multiple domains for the same keyword. Companies should target dissimilar keywords for different domains in order to maintain their efforts...

There is no harm in redirecting a webpage into a faceted page of an e-commerce website. Faceted pages are the pages we see after sorting with an option. After the sorting...

If the content on different domain pages are different then they should not be declared canonical to each other domains. I checked few URLs like, https://www.zazzle.co.uk...

You will have to remove the redirects finally after migrating to example.com Shopify website.

I am agree with you @ms but it needed directly in the mailbox.

Searchengineland, Searchenginejournal, Seroundtable, Google SearchLiaison on Twitter, ... and Seoforum, of course ;)

Yes, that would be nice. Would require a little bit more exposure for someone credible to write valuable post and publish it on Seoforum I guess.

Have you ever thought to attract bloggers across the globe to post their unique blog posts here, Martin?