[irrational]

Why does everything have to have a business model? Sometimes people like to create things for the sure enjoyment of creating things or they have an itch to scratch and think others might have the same need. Not everything is nefarious.

[Volt]

Exactly for the reason they said. The concern isn't that extensions are necessarily nefarious, but that people often want something in return for their work, which might be money by whatever means.