Ah, this is why I had 20 in mind. The second paragraph itself is directly contradictory with its own rules.
"The player and gamemaster must decide on the exact details, but the benefit is that for each point of Karma (up to 20) spent on Stolen Gear, the character gets 10,000 nuyen (see below) to spend on gear, cyberware, and/or bioware during character creation. These points are spent instead of the normal Karma for extra cash (not in addition to), and extend the possible additional funds to 150,000¥."
This vexed me last night because I knew I read everything carefully before I made and posted the build.
Edit: In further thought, the line "extend the possible additional funds to 150,000¥" almost reads to me like "extend the possible additional funds you would normally get without this quality from 20 Karma into Nuyen by 150k with the quality", but that math would still be off by 10k. Perhaps they were playing around with 2,500/karma at some point, or the author/editor thought it was 2,500.