And it's even more plausible this is just a marketing play to build hype. Take, for example, you just made some new super-pathogen in your basement lab. It could kill everyone on the planet. This is obviously pretty dangerous, so do you:
A) silently dispose of it and hope nobody else ever makes the mistake of creating it.
or
B) keep it in the freezer and hold a press release about how you made it but it's too dangerous to share any details.