You win more money by playing at greater stakes. This means that players who play more frequently or for greater stakes quickly clear their bonuses. To take advantage of a bonus, it may be tempting to play outside of your comfort zone. But doing this is never a smart move. Play at your typical volume and comfortable stake level, and wait for the bonus arrive as it may. It's okay if you don't finish the entire task. The top online poker bonuses are escalating, so your bankroll will still increase.