Can it be sold or marketed on the entire planet?
Start a Meme
Starting a meme simply means to innovate a new approach which is copied because it is actually the superior approach.
Outer limits
Facility
Goods intended for sale
Prices which are effective
Circumstances
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What is more efficient, more effective?
I suppose also the genius of taking the metro and instead of driving is that if you are with your kid, there’s a double fold joy; kid just love being metro! Even if it takes twice as long, the benefit is they could run around, look at other people, get a better view etc.
And I also suppose, the downside of driving is that you are forced to sit on your own butt. If you want to metro, at least you have the option of standing or sitting.
For example, better to stand in a metro for 30 minutes, rather than to be sedentary in a car for 15 minutes.
What is better for your muscles?
I think a new thought is thinking about efficacy, or effectiveness for muscles. Anything which allows you to be upright, outside, moving around, getting stimulation for your muscles is generally a good thing.
For example, there is literally no downside to walking. Running is bad; running causes injuries. Walking has no downsides. 
In fact, if you think that running is bad, as I do… Maybe it needs to be our ethical imperative to educate people how it is bad for you. Or just encourage everyone who is into running to get a 60 pound weight vest instead, or at least to buy some vibram 5 finger shoes.  Throw away all those loser Hoka shoes, and even worse… Brooks shoes in the trash!
Foam is bad.
The more foam on the bottom of your shoe, it is like adding a metaphorical condom which is 5 inches thick! The goal of an ideal condom is to be practically as soon as humanly possible, ideally invisible. Maybe just a millimeter thick. The same approach should be for shoes.
The bottom of your feet is like a metaphorical penis?
When it comes to sexual pleasure, ideally you would just have sex raw, for maximal sexual penile pleasure. Then technically the ideals to just be barefoot, if you want Max foot field ground pleasure?
Just be a hippie, go on a walk in nature barefoot! Just wash off your feet later.
Or, vibram five fingers shoes; a good hybrid model, just enough protection to divide you from the floor.
Can it be disposed of?
The open market
An open market ,,, kind of like an economic open source?
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