This is the fourth year in a row I haven't been able to get a spot in the half dome lottery. Starting to think the system is rigged.
What range of dates were you requesting? The odds of getting a September date is over twice as much as it is earlier in the year. June is the hardest month and of course Saturday is by far the most sought after day so I never even bother to ask for that day.
https://www.nps.gov/yose/planyourvisit/hdpermitsapps.htm 
