The amount of Trust Points you receive depends on the star level of the Dragon you receive in these Drafts. You can also find this in the info section of these Drafts.
3-Star Dragons give 5 Trust Points
4-Star Dragons give 15 Trust Points
5-Star Dragons give 50 Trust Points
3-Star Dragons give 5 Trust Points
4-Star Dragons give 15 Trust Points
5-Star Dragons give 50 Trust Points