I wonder if part of this pricing scheme is to counter (or at least to short-term profit from and eventually change the behavior of) the provider being abused by

I wonder if part of this pricing scheme is to counter (or at least to short-term profit from and eventually change the behavior of) the provider being abused by spammers/scammers who could previously scoop up benign reputation IPv4 addresses from the far corners of the world and pull them over to Hetzner for very little $.