User blog comment:Na299/Ways of Gold Farming/@comment-26388545-20150526205247/@comment-140.101.116.2-20150527085846

Did you do any other races outside these two challenges? Btw, it won't multiply all the level up golds for all events. Here is an  example:

assume two challenges and each has 10 events (no multiple goal event).

event 1-5, level up 88-89, total earning is 22 * 5 = 110

event 6-10, level up 88-90, total earning is 44 * 5 = 220

event 11-20, level up 88-91, total earning is 66 * 10 = 660.

at the end, you shall get totally 990 golds.

you must skip the multiple goal event because it will stop this.