: You must contact them via email to purchase a specific unlock package. They offer different tiers, such as: Tier A : Limited to 5 devices.
IPSW stands for (though it works for iPads, iPods, and Apple TVs as well). It is a signed, encrypted archive containing the entire operating system of an iOS device. When you plug your iPhone into a computer and click "Restore" in Finder or iTunes, the software downloads an IPSW file.
: Many users visit these sites to download specific iOS versions that are compatible with jailbreak tools like Palera1n or Unc0ver.
The keyword is a hybrid search. It suggests a user is looking for a central repository ("hub") where they can download an IPSW that will unlock something.