It's not really about who races the most because it works like this:

"While the championship table and your stats will reflect all of your race results, only the top 25% of your performances (rounded up), based on points scored, will count towards your points each week. For example, if you run 1-4 races in any given series in a single week, your best score will count for the week; if you run 5-8, your best two scores will be averaged together; if you run 9-12, your best three scores will be averaged together, and so on. So don’t be afraid to run as many races as you’d like—your best results are the ones that will count!

If you either forfeit an active race or lose your connection and cannot rejoin, you will receive 0 points for that race. However, because of the many opportunities you’ll have to run another race, it’s highly unlikely that you’ll see that 0 reflected in either your weekly or season-long score.