As someone who only has the space to grow one plant at a time, Pick 'n' Mix Seeds have been brilliant, compared to Attitude. Plus Attitude's Payment System crashed on me three times, causing me to have multiple orders that I couldn't pay for or delete.
As to the people who are getting dud seeds... I've only ever had one seed not germinate on me and that was from Attitude, not Pick 'n' Mix..
I changed my germination method and haven't had any problems since!
Honestly, how (and more importantly, why?!?!) would a seedbank pick dud seeds to sell?
They know that despite their disclaimers people are going to try to germinate them and selling duds would put you out of business pretty quickly...
Do you think they purposefully irradiate all the packs from the breeders before splitting them up??? Whatever it is you're smoking, put it aside until the paranoia passes, then think again...
As to not replying to the comments about duds, they can't. Legally, it is none of their business what you do with the seeds once you have them. Encouraging you to grow them would get them arrested.
To summarise: I have never had a problem with Pick 'n' Mix seeds. They are cheap, fast, and well packaged. If you are having problems germinating your seeds, maybe you should re-examine your process.
Peace.