[benjaminpv]

This is as much a stab in the dark as any, but as someone that builds/rebuilds ROM sets pretty often (leading me to do a lot of hash-specific searches) I've noticed that there's a lot of crypto-trading related hashes in the indices they maintain.

I'm assuming what happens is that the hashes for various blockchain transactions have a lot of common sub-strings within that collide with non-crypto stuff, hence why they get offered.

Maybe the folks that manage the search engine were finding that these crawls were adding a lot of useless info and just blanket blocked their inclusion?