Is there no way to enroll more than 50 people in a sequence at once? This is nuts.

Not sure if I am blind or is there really no solution to enroll more than 50 people at once in sequences? One of my client only want to use Hubspot sequences to send mass emails (so that the data stays only in one system). Their lists are around 2000+ people.

Am I missing something or is it really just 50 people at once that can be enrolled?