To me, "hoard" comes with an implication of amassing these in secret and/or not making full use of them. If Meta is crowing about how many they have, and seemingly putting them to good use (or at least some use), I wouldn't call that hoarding.
I occasionally acquire half-decent hardware for stress testing. If I add a pair of Dell servers to the lab (or, heaven help me, anything from IBM), I don't feel like I'm hoarding. What I do feel, after spending $50-500K of someone else's money, is a responsibility to get their money's worth out of it.
I can understand, then, Tesla shareholder frustration with 12,000 of these being diverted to a different neighborhood in Muskville. Talk about other people's money.