The 2020 EA survey link says “More than half (50.7%) of respondents cited 80,000 Hours as important for them getting involved in EA”. (2022 says something similar)
I would also add these results, which I think are, if anything, even more relevant to assessing impact:
I would also add these results, which I think are, if anything, even more relevant to assessing impact:
80,000 Hours is the second most commonly cited factor for “having the largest impact on one’s personal ability to have a positive impact” (after “Personal contact with EAs, so it’s the largest substantive program, org or service), being cited by 31.4% of EAs.
The 80K website alone is comparable to EA Global or the EA Forum in cited impact.
It’s also the most commonly cited factor, by a dramatic margin, for causing EAs to learn something important in the last year, being cited by 40% of EAs.
It’s also the second most important factor for people hearing about EA in the first place (13.5% of EAs).