Also, renting out a botnet means sales pitches to unsavory people (Q: who'd want to rent out a botnet? A: someone who's probably not trustworthy in paying his bills).

For a botnet herder, bitcoin mining means they don't have to work or pay for sales or collections.

Well (and here we start to approach spoilers) it turns out the phenomenon of made-up words are relevant to the plot.

Looks to me like an App Store success story! A $32,000 success story for his contractors.

Like the California gold rush, the folks selling shovels are the ones getting rich.