A genuine retail copy of Office Professional Plus 2019 can cost between $400 and $600. For a home user or a startup, that is prohibitive. The "Pre Activated Exclusive" version is often found for a fraction of that price—sometimes as low as $10–$30.
Most "Exclusive" pre-activated copies are made for one PC per install. However, because they bypass product keys, you can technically install it on unlimited PCs, but that increases the chance of detection. A genuine retail copy of Office Professional Plus
Possibly, but rarely. KMS emulation tricks the software into thinking it is on a corporate network. Microsoft does not actively hunt single users unless you try to get tech support from them. because they bypass product keys