I saw 13.1 million come out from the alt national parks Facebook several days after seeing 5-11 million estimate. From that post it seems like they had people at each protest doing the work, whereas the others are back of the napkin estimates. So I’ll go ahead and accept the absolute minimum conservative estimate being 4 million, while probably actually 10+ million.

You’re comparing a laptop at idle to the power supply for a pi that needs to power it at full load plus overhead and inefficiencies. That’s like comparing apples to an orange tree.