The $100/year pricing makes me think of the discussions about making email a paid service to fight spam (a single message would cost a fraction of a penny, so "

The $100/year pricing makes me think of the discussions about making email a paid service to fight spam (a single message would cost a fraction of a penny, so "normal" users would pay a cent or two a year while spammers would pay tens of thousands). It's both good and bad; it means there are a few roadblocks to distributing an extension (nefarious or not), but it's also not such a huge roadblock that a bad actor can't work around it.