Do you worry that you're taking money at a valuation that's predicated on artificially and transiently elevated demand? It doesn't sound like you have a business compatible with the VC hyper-growth model, outside of the present extraordinary circumstances.
It also feels intuitively like many person counting use cases are satisfactorily addressed by far simpler and lower cost heuristics such as, for example, Google lining up device 'throughput' with lat/long and business records. In fact, I just used their estimate to time my visit to the DMV and it worked perfectly.
Admittedly, it may just be that I'm not creative enough to envision sustainable, valuable use cases for this. But if you've been around 6 (?) years and just took $51M in Series C without being significantly diluted, KP is presumably assigning you at least a $250M valuation and possibly a lot higher. After accounting for terms like e.g. liquidation preference, the economic picture of Density could easily be a house of cards.