If they were spending 57M a year that would be different and they would like likely have an enterprise level team. 57M over 14 years doesn't warrant that, and in particular, I'd expect that to have been primarily in the prime years for content on FB, 09-12.

Assuming an even distribution over 14 years, for FB today, spending 300k a month might warrant a rep but it's at the very bottom of tiered spend.