I've told two people about your site (in person, verbally) and both of them have been confused about the "dot" in the name - thinking that it's a single character "dot big bang dot com". Why not Big Bang? More memorable and easier to communicate.
As for the name it's a historical accident as far as I know. Our CEO began dot big bang as a hobby project back in 2012ish and wanted to call it big bang at the time but obviously that's a very hard name to get a good URL for. So he prepended a dot which has since stuck. I think we're keeping it for the foreseeable but other URLs are definitely worth a thought.
"support dot dot big bang dot com"
You can see where this going :)