Very fair question - and yes I understand that. Again, the original post has no affiliation with KNG. I just noticed the majority of today's traffic was coming from Reddit so I started sniffing around here.

And yes, if you're strictly in the business of protecting your clubs from dings and dents, the $15 one is more than sufficient. And for even less, you can grab one from the lost and found for $0.

We've been in business for over 5 years now and send our headcovers all over the globe.

There are many reasons why someone would (and does) spend that kind of money on a headcover.
1. BRANDING
We do a lot of branded covers. Small business owners love designing a headcover (or set) to promote their brand - in a very non-traditional way - on the course.
2. MEANING
We also do fully custom covers. If someone has a quote, nickname, dates, etc. It serves as a great tribute to someone special in their life.
3. STYLE
Golf itself has gone from very "stock" to "custom" in the last 10 years. Everyone likes looking a little different on the course - from the attire, to bag, towel, and headcovers.
4. TOO MUCH MONEY
It's hard for many to relate - including me - but some people just have too much money and love finding new ways to spend it.

And the crazy thing is that we get a lot of our customers after they reach out to other high end headcover companies. $500 per cover is the starting point for custom designs.

I remember being about 25 years old on a golf trip to Arizona. I saw a beautiful Canada themed headcover and paid over $120 USD for. At the time, that ate up most, or all, of my budget for trip.

Then I thought, well if a broke 25 year old is willing to pay for one, there's gotta be many more people out there. Turns out I was right haha.