Races take an unreasonable amount of time to level from 80-100 sponsor points. (literal years)

[djfksla fdjksl]

If my math is right, it would take at least 155 races to get from 80-90 currently. To get from 90 to 100, if it's possible at all, would take a minimum of over 1 million races, which seems unreasonable. Is there a chance that this is on purpose?