Either they are extremely lucky or they already have a ton of money so as to buy enough that when the time comes to breed them they immediately make a profit...
And I am in the same boat. I dont plan on making any 7 bangers but if i can create some originals and a good majority of my favorite combo morphs and just break even I will be happy! Heck I dont think I have to break even I dont mind spending money on my animals. I spend more on them than I do on myself...