At the time of writing this the average + was about 185, so if you recruit 1 person and they get 185 in profits, you are technically an average referrer by the profit metric.

The below leaderboard under, "Top Referrers," at this link: 

If you agree with this poll statement, that would suggest that, looking at the given users' audience betting behavior and accepting betting behavior as a loose metric for, "smartness."  Of course the variability could be pretty wide within a given audience and this is not saying anything about individuals within that audience, just on average.

Further analysis, if we take the top 20 referrers and take the ratio of (average profits)/(users referred), we get:

Normalizing that and grading it on a curve:

Related questions