ec2 pricing options

Some seemingly important phrases are read aloud but not explained. It would be nice to get some examples or illustrations. For example, what does it mean to say, "your app is only feasible at very low compute prices"? What does it mean to say, "you want to bring your own server-bound software license from vendors…"? What does it mean to say, "you have regulatory or corporate compliance requirements around [the] tenancy model"? These are just some of the phrases I found under-explained. Reading them aloud doesn’t go that far beyond the whitepapers. Perhaps we can continue using the pizza example? Thanks.