Even the most reliable servers may crash. Despite all the claims of hosting companies and cloud services, the chance of data loss is still very high.
So one of the best strategies for ensuring the continuity of a website, is to backup all the files and data, monitor what is changed on the website, and to be able to restore it as fast as possible.
There are companies which claim they scan a website on a daily basis, and backup it on a daily basis. That gives a peace of mind for the owner of the website, until you see that your website is hacked, and when you check the logs, you would find they hacked it 10 or 20 days ago; and no one caught that.
This type of services are more of a responsibility than something to make money with it. But we offer this services to our clients, in the most cost-effective way, just to let them have a peace of mind