I think, if Lutpin took on average 1% on all his campaigns, he would've earned around BTC1.21 as per his statistics.
Wrong math
1% from 12.1 btc it is 0.12 btc (not 1.21 btc as you said)
Anyway, from what I know a campaign manager take a percent (3% -just an example) from the total advertising budget of that campaign.
Is not a easy job ...
I was doing this math lol
So if they paid 10 btc, manager will won 0.3? Not a big deal since they have a lot of work, accepting new members, check spam, count the posts, make the payments...