I never got that razor subscription service. I'm happy enough taking the hit of a couple of bucks and buying only when I need razors.
Cartridge razors are such an enormous waste of money by comparison, and I can't even imagine needing a subscription for them.
They've been great for me, and have been the first and only brand of double-edged safety razor blades I've tried, so I have no point of comparison with other brands.
The opposite, marketing lower priced items because they have a lower price limits profit potential unless you have some technological advancement that really drives down cost.
There are 'visionaries', who want 'to change the world' and there are people who knows what they can start a business, make it profitable and then move on with profits.
Hayley Barna moved on in 2015.
If your choice is to 'change the world' then of course it's not 'optimal'.
But stupid jokes aside, I used razors (for my face) only in my teens and early twenties, after that I moved to trimmers and occasional 'canadian lumberjack' look out. Trimmer are good enough for the face, armpits and most of the bush. At this rate I measure the lifetime of (disposable BIC) razors in years.
Unlike taxis, there isn't a blitzscaling story here, either.
The problem was the razors just sucked.