I don’t think it’s inbred as much as its selection and the reality of autoflower breeding constraints when there’s demand. In other words, your batch will vary if it’s not line bred a certain way. If a breeder has to use more than one mom, which I suspect is happening with them, you could end up with a variety of types within one strain.
Their customer service is god awful. In 2020-21 I spent over 3k over the course of a few months with them. I was on a quest to make great auto regs…
The first time I had germ issues it was a new release, I picked up two packs of Jammy Dodgers #2, I emailed them, half the 10 pack wouldn’t pop. I gave them a basic and friendly explanation not thinking much of it, and they gave me a ‘bummer, you’re out of luck, bye’. No questions, just a rude response. A short time later the same happened when I was shorted something from a special release. I didn’t get a listed pack and they said it’s a freebie and we’re short and rude again. I stopped posting on AFN years ago in part because of the Mephisto weirdness, their loyal growers are worse than cookies fans.
Compared to some other breeders and stuff I’ve tossed together, I get more stunted plants, and they don’t seem as consistent in general, and if they don’t germ, you’re out of luck. In my experience the plants smell nice, the smoke is generally quite nice, but the vigor, size, yield and consistency is sometimes lacking. Some of their stuff might be F5+ but plants from any given pack can be all over the place.
As for that auto reg quest, I’ve made a ton of small batch auto regs. One of the best is/was made with the blueberry Sativa Regs which I’d worked more sativa crossed to the Jammy Dodger #2 that gave me all kinds of problems germinating. Got 100% germ, and every single plant is nicer than every other strain I popped. The worst looking autos in my latest batch are a Mephisto freebie, from plants known to be quirky, so we’ll see. However, I’ve consistently come to expect smaller and less vigorous plants from Meph as a whole compared to other breeders and my own crosses.
Now with the latest thing about Daz and some of the regs he’s released and having an issue with others making seed… They clearly think very highly of themselves and I can’t help but question the way they operate in some regards. It’s not like they’re Ethos or MMS for me, but I doubt I’ll give Mephisto or Night Owl my money again.