Sagittarius Trade Routes
Samaritans are from a star system near the Sagittarius star system. Their relationship with the grey was the disruption of their star gates which limited the greys trade. they are monitoring the greys abuse of the earth and adjust the star gates. The sagittarians are more advanced than either the greys or reptelians, they only monitor the activity indirectly. At this point the grey's genetic damage is beyond repair, but however they will receive more star gate access if they stop manipulating earth humans.
At this point the sagitarrians do not choose to interfere with the conflict, however they have noticed intention of some greys for a change and decided to give them a chance. Actually, there are various coordinates with rich resources, but have been discourages because of the conflict.