Full disclosure: I work at UpCloud, a cloud hosting provider and I think business in this industry day and night.

One thing that gets overlooked in almost all comparisons is the pricing models. I actually use Glacier through Arq (brilliant backup for Mac), but the catch is in the requests. I recently uploaded 200GB of photos to glacier and the upload process cost me about $10. The monthly storage is about $2.

The thing is that you shouldn't compare the sole storage price, but the total of cost of storing your data in glacier, which was also overlooked in the original article.

I'm sure AWS has understood this through their S3 storage lifecycle and thus developed an appropriate pricing model for glacier that arouses interest in the product like no other.