I find the venn diagram of spammers and "legitimate" companies increasingly overlaps and it's impossible to cleanly differentiate the two.

my university spams me. i bought a torch from olight. they spam me. i get food deliveries. they spam me. i bought some tech. they spam me. i look for real estate they spam me. i get a delivery. they spam me.

it's differentiating between the two that's unrealistic.