I'm thoroughly confused on their pricing model. What is a unit? Am I reading this correctly that $500/mo comes with 25GB? So $20 per GB transferred? Which we'r

I'm thoroughly confused on their pricing model. What is a unit? Am I reading this correctly that $500/mo comes with 25GB? So $20 per GB transferred? Which we're talking about running a real browser downloading all the bloat of a target website, 25GB doesn't go very far. Is this just absurdly expensive?