When posting suspect links pleas break them so they aren't active to avoid accidental exposure for others - changing the http to hXXp in the urls you posted breaks the link, people can't accidentally click on the suspect link.
This link however is entirely different to your original one and should perhaps be kept separate. But weird links from twitter doesn't surprise me in the least (I don't use any social networking sites, so can't really speak on it).
As far as not being able to get a screenshot - that would most likely have also given a URL:MAL as the reason for blocking the IP address.
It is possible that this is because of the history of that IP address (link in Pondus's post), previously it has been used/owned by many other domains (not just the amazonaws.com), these other domains and their random names are highly suspect. These may well have been malicious and this is probably why the IP address is blocked,