In the This Week in Startups podcast, @csallen and friends discuss paid browser extensions for a bit after @csallen brings up @jdnoc's Closet Tools. The host, Jason Calacanis, even lists three browser extensions he pays for.
"To me it's awesome that the internet is big enough that a browser extension can support an individual. [...] And by the way, it will still double. We still have 3 billion people that aren't on it." — Daniel Gross
Here's the timestamp link to the segment: https://youtu.be/LuWkNQvkbcg?t=2978