My mate Tolly's company are distributors for Purple Extreme.
I was using PE before I was introduced to Tolly by a mutual, non-cycling friend.
No, I've never received any freebies or mate-rate PE from him - and why would I? It is his livelihood.
Having said that, Tolly has always encouraged me to use PE in as many applications as I can think of, aside from my bicycle chains.
He's a canny lad.
I notice that the current bottles have a much larger orifice through which the oil pours than those of around 8 years ago
FWIW I've tried various chain lubes over the years, I've yet to find one which ticks as many boxes as PE does. I rarely ride off-road.