Ask HN: Why were all the popular posts about Web3 posted in the last 2 months?

If you search for "web3" on HN, and sort by popularity for all time...

https://hn.algolia.com/?dateRange=all&page=0&prefix=true&query=Web3&sort=byPopularity&type=story

... you can see that all of the most popular posts have been submitted over the last two months, and the vast majority of those in the last 30 days.

Is this some sort of astroturfing attempt? Have I not used the search properly? Is writing and submitting blog posts about web3 a new trend?