Why is this significant?
First, because Blogger's FTP solution was used, mostly, by professionals. Top-ranked, old sites with frequent dedicated journalists characterise the FTP user. TV stations, for example, were common users. FTP users pay for hosting, own their domains, and were capable enough to set up a more complex system. I'm guessing (Google won't say — they've been asked repeatedly) that the 0.5% of users which fall into this category accounted for as much as 25% of Blogger's traffic.
Second, many of those old, professional sites are going to get "deranked" by the "search engine" system. Authors report that they are changing domains, moving pages around, and their old sites are now filled with broken links and images. These veterans and their links will no longer weigh in as heavily on the search results — shifting the readily available Internet average content away from small, independent sources towards the unaffected big news outlets and free-site spammers.
Google briefly set up a discussion room to allow users to suggest solutions to this problem, but terminated it in about 20 days. People on that forum were helping each other move off their platform, or subvert it with reverse publishing solutions. You can see evidence for this, today, by searching for "blogger ftp" and "custom domain" in their news groups.
(Note: I was surprised Slashdot didn't mention this... it deserves mention... please edit my post down, I'm not the greatest writer, but you should have something about this... the effects will be substantial.)."
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