Need to backup the giant unwatched porn and movie collection somehow, and paying for that would be expensive, so pushing "unlimited" offers by companies as far as possible is a favorite past time of these people.
this isn't a mom and pa business people are "exploiting"
and by "exploiting", I mean exercising their rights under the contract the multi-billion dollar huge multi-national wrote
If restaurant offers a person an all you can eat buffet, and that person sits for 4 hours in an online eating competition, that person definitely has abused the offer made. Doesn't matter the contract's fine print.
of course it does, this is the entire basis of Western business
you write contract that benefits the other party more than yourself? well, tough shit
the company offered unlimited storage in a freely offered contract in exchange for money
their counterparty paid them and is expecting to have unlimited storage to use
the only person being immoral here is the entity that marketed their service as unlimited when they had no intention of providing it
this typical modus operandi of giving away stuff for free or at a loss until everyone is dead, the ground is salted and nothing grows, is toxic and bad for end users.
EDIT: One user claims to have 2 PB stored. Wow.