It literally is, by definition.
Incorrect. Bots will use the boosts to get instantly into TBC content and farm massive amounts of resources and gold, getting to skip all the time and expenses they’d otherwise have to spend getting there.
Because it’s instant, they can get right into the content they want to farm rather than having to level through the old zones where they might be detected and reported before doing any harm.
Profession alts (which is what all my boosts will be used for) are going to flood the economy with resources that are supposed to relatively rare due to a cooldown attached to them. Profession alts that most people wouldn’t have because leveling serves as a deterrent.
Actually, in competitive raiding, you might. Having a boost to be able to instantly get to level 58 and swap to a split raid alt that the group needs gives you a significant recruitment advantage over someone unwilling to pay money for the boost.
That is especially the case if you don’t have that alt precisely BECAUSE of the time it takes to level them.