Here: “Another thing is you’d not only have to come online and have your vaults filled up, but also stay online for a while to gain reputation to get data and later read requests.”
As Neo said you can’t just stand up new vaults and disappear when convenient. New vaults won’t even get any data uploaded after they’ve been online for a while, so as I said on that other topic you’d have to pay (reserve) vault capacity up front, wait till the vault gets sufficient reputation to start getting data, and then wait till you get the first GET requests (and this last step is where you earn). That’s also why I was saying you’d have to pay operating expenses up front and start earning SAFE coins incrementally maybe a week or two after you put the vault online.
Then if some Amazon customer wants to buy more storage for $30/TB/month, if you dropped the vault you’d lose 1-2 weeks of power and bandwidth investment in making the vault reputable enough to be used by the network.