I have to be honest man, I try not to get involved too much with what I see on social media, but from what I can tell Greybeard looked to be born on Facebook, and they created dozens of fake accounts to sell seeds (and the accounts get banned, and then rinse and repeat, it's a disgustingly common practice on Facebook.) I e-mailed them about a reversal spray they offered asking what was in it and how it was made, no response. I asked in a few groups if anyone knew where they did their breeding work, if they could show their work, and again, no response. This last part take with a grain of salt, but I also had several people tell me he just relabels seeds as his own and that's what he's selling as private stock.
If someone knows more about them, please show us where they hang out, because I've seen nothing to back them up.