What is the incentive of the industry?

Are products popular? Are popular products successful for the market/producer?

Questions I wish to through in the air and see what the responses will be.

As an example, I wish to introduce one of my favorite, the Joby Micro Tripod.
I was surprised I found a seller today: https://fotogrijpink.nl/joby-micro-tripod.html

When I bought mine, I paid a forth of the price mentioned. In fact, when I searched the last time, some year ago, I could not find any. 

Now, Joby post on their webpage: https://joby.com/global/griptight-one-micro-stand-black-jb01492-0ww/

It appears the Joby micro is back, when you accept buying something I don't need.

When it all was fresh, I bought those...

Hopefully Joby (and the world) remembers, how cheerful and useful those things are.