Unsure what this $1000 a day thing it should be; current affiliates do up to $100 a day, no one $1000 a day yet... but I think who have traffic worth $1000 a day is not an affiliate really, but instead dealing with brokers and ad networks.
In fact who have so big traffic will sell spots for monthly pre-pay fixed fee, ur use ad networks for that, still being pre-sold or high bid price.
Affiliates I think it is many small traffic sources, this is why I've put the minimum payout to $10 and I see someone really take the money out when reached $10
Those doing $100 a day take out every $500; I think whoever have more traffic then that would be not an affiliate but (like a tube) sell spots in pre-pay or join exo-click's and such.