Anybody else disappointed that an article "How to do cheap backups" didn't at ALL describe how they, well, actually do the backups? I was expecting some smart

Anybody else disappointed that an article "How to do cheap backups" didn't at ALL describe how they, well, actually do the backups? I was expecting some smart copy algorithm, not a post about the price of hardware. Also, they compare their hardware when at full capacity, to AWS and others scaling pricing model. Their first GB will cost a lot more than stated here in price / GB.