When the first of the Amura came to light, they were worshipped as gods - given the best huts in their clans, fed, washed and clothed in the finest materials. In exchange - if a Dralic required sexual relief - they made an offering to the Amura and would spend 3 days in a tent with one to relieve their stress. The offering could have been anything from their home clan, such as food, hides, furs, crystals or even handmade crafts.
The Amura then were not allowed to have mates, be marked or mark others in any way - they were purely shared among their people for this purpose.
However - rules were made to be broken when an Amura fell in love with one of their visitors and chose them as their mate; the Elders punished them for this by taking away their privileges.
The Amura from then on - became slaves; during certain times of the day, they would be tied to poles in the centre of tents for hours. Any Dralic could walk in and take advantage of their exposure for their own pleasure.
In between these times of servitude - the Amura would be cleaned, fed and allowed to sleep with others of their kind, however, their hands were always bound and their mouth muzzled to prevent them from pleasuring both themselves and others.
Thankfully this is no longer how they’re treated today.