And if you're a bot operating at scale, you can use different devices for crawling and challenge solving.

Do you have an underpowered TV box that would need hours to solve difficulty 6? Do you also have a Windows box where somebody installed gta6_leak_full.iso? Great, have the TV send their challenges to the Windows box for solving.

If you're operating at scale, you probably have hyper-optimized Anubis kernels, E.G. compiled for the particular set of SIMD extensions that a given machine has. At that scale, getting 1% more juice out of your machine pool becomes worth the squeeze. In the worst case scenario, you can probably get some cloud boxes on AWS to do the challenge solving for you.