The tribes have a history of being more pragmatic about buildings that would be considered distasteful elsewhere. Smart to at least explore this option, and if deals can be made then it seems like a fine outcome.
If a datacenter brings infrastructure with it, such as telecom, grid, and water, that could be a boon as a lot of tribal land has a lack of utilities. There's also a real chance that development will exploit tribal governments without benefiting the tribes.
Or just tax revenue. Big Tech struck some super shady deals–it's caused a backlash. But that doesn't mean the other end of the pendulum's swing makes sense. If your town needs new roads or more teachers or doctors, having an multibillion-dollar immovable asset in its midst is an obvious advantage.
With the right tribal leadership, generational wealth building is a real possibility.