Note the entire sentence: ScaleGrid’s Dedicated Hosting service with 2 Replicas + Arbiter for MongoDB® database on DigitalOcean saves you on average 122% on yo

Note the entire sentence: ScaleGrid’s Dedicated Hosting service with 2 Replicas + Arbiter for MongoDB® database on DigitalOcean saves you on average 122% on your monthly AWS hosting costs, and 140% on your monthly Azure hosting costs. This is sentence is about AWS vs Azure vs DigitalOcean hosting costs at ScaleGrid. Earlier in the article you can compare instance costs across the cloud providers by RAM.