Haulix promo senders set their download and streaming permissions on a per-promo basis. If you don't see a download button, then one of two things are happening:
1. You used up all of your allotted download attempts. If this is the case, submit a support ticket, and a Haulix team member will reset your downloads. You can also contact the respective publicist to request additional downloads.
2. The promo is streaming-only. Some publicists choose not to offer downloads with their promos. To find out how a specific promo works, don't hesitate to contact the respective publicist to request more information.