I have to agree, a normal company would have a notice of changing names and an under construction type sign on the site. They would later redirect to new name and new site. Once change occurs. Letting a site go and the only info coming from a board - isn't normal. If they don't want to pay the bill it sounds a little strange to make no notice. Anything, even a notice on social media would help.
So its:
1. They forgot to pay the bill for whatever reason (possible in this case)
2. They are desperate (possible)
3. They are doing a new site, its all part of their big scheme to make big bucks for investors. (not likely imho)