None? There's like 12 jobs per datacenter and the revenue goes to the Valley, mostly. The utilities get some profit but I doubt that money stays very local either.

Places I know that are getting them are generally seeing big time pay (relatively that is) for construction work and then dozens to a hundred of ongoing jobs once the work is done. That doesn't sound like much but it's huge for many of these communities.

Data centers pay taxes don’t they? That money presumably goes into funding government services which would necessarily raise the local GDP