Tad did research on this a while back and now i believe it all. He said around level 10 to 15 seemed best for his alts for pulling coats etc. I had the same experience around that time. Now it seems like it happened again after 1 million. At 1 million was like level 1...absolutely nothing from offsprings etc. When i hit 1035000 or so i started getting all sorts of cool things constantly out of all my offsprings..until yesterday when i released a ton and got over 1100000. Now i'm back to junk from everything. This may be coincidence...couldn't tell ya. But i'm going to get my alt to the level 10 to 15 range and see if this theory is true