I was checking Amazon's hosted relational database offer, say for a typical case of 30GB data and 20M queries / month
Per month cost :
Storage $0.10/GB = $3
I/O $0.20/1m requests = $4
CPU $24/month for 1 year contract.
And I haven't factored in data migration charge.
Total : $30/month.
Which I get at $10 form DigitalOcean.
I still have no idea how Amazon's offer is better or why people flock there. Going "server less" doesn't save you the server cost, rather increase it by 3 folds.
Maybe it's the old IBM MS or Oracle like effect -- "No one gets fired for choosing AWS" now a days.