I don't think that link says the fired researchers are getting job offers? The only mention of job offers I see is Mitchell's tweet, which from the context seem

I don't think that link says the fired researchers are getting job offers? The only mention of job offers I see is Mitchell's tweet, which from the context seems to be about colleagues of hers currently at Google getting offers elsewhere. Basically she thinks there will be more resignations because more people are just now getting alternative offers. I couldn't find anything online about Gebru or Mitchell actually getting offers, although IIRC Gebru said she has no interest in industry right now anyway.