Bime: Subdomain takeover due to unclaimed Amazon S3 bucket on a2.bime.io

I noticed BIME is primarily built on Amazon AWS, which spawned my interest. I started looking for DNS entries that were still pointing to S3 buckets that however no longer exist. It appears this was the case for a2.bime.io, which points to an Amazon S3 website bucket in the US East region. Steps ...