There just aren't many .net & .org sales in four figures (at least not reported to us). With competition from the new extensions, I don't think that is going to change. While .com has not been affected by the new extensions I think net and org have been. In many cases info, biz or us works much better with a term than net or org. The .com has obvious recognition advantages that none of the other extensions have and since all of the non .coms are going to lose some traffic to the com, I don't think it makes much difference which alternative you use as long as it is the best fit for your word or term.
I don't know what org's price ceiling is. They have never been likely to hit high numbers but I have had consistently good three-figure sales results with well chosen .orgs. I haven't had any luck selling .net however. Unlike the others it has no clear meaning (the ISP use having been diluted and lost long ago) and thus no way to differentiate itself from .com. I think it will continue to lose ground to the new extensions so I would guess you would continue to see sales on .net fade while figures for the new extensions rise, just as they have for the past year.
