If you're not making extensive use of your Humble Choice discount in the store, you might want to consider canceling each month that you don't like the games instead. I cancel every month regardless, then throughout the month I get emails offering increasing discounts on the current month's bundle, until I eventually get an offer for one month for £4.50 a couple of days before the current bundle ends. It's resulted in me getting twice as many games for less than half the normal monthly price.