You're right. The largest number you can buy in a package is 20,000. Although you can place a custom order for different amounts than those in the packages, we encourage people to go slowly at first, especially if they have a brand new or low-views account. That's because YT sometimes gets suspicious of accounts that grow too quickly. If you want to get 100k views, we recommend doing it over several weeks—say, 20,000 a week for five weeks, or 10,000 a week for ten weeks, instead of 100000 in a 24-hour period.