Likely because they had just lost what they said was "42 million in adjusted dollars." Minus whatever precious materials they were hauling.
To the other:
1) The signal could have deactivated once Dallas and co. entered the derelict.
2) As was described by Cameron, the derelict was damaged by lava/seismic activity. Which would have damaged the beacon between the time of Alien and the colony being established years later.
Quote from: Mastes1 on May 31, 2012, 12:31:08 PM
Its implied in ALIEN (at least imo anyway) that the company purposely replaced the Nostramo's usual science officer with Ash, why have that dialogue scene in it unless the viewer is supposed to think that Ash was replaced on purpose.
There's a difference between replacing the science officer and having an interest in a signal, and then on the other hand knowing that the crew are going to find eggs that have a parasitic organism that gives you a seven foot tall bio-mechanoid death machine that bleeds acid.
If they had such specifics, they would have done one better than just having ill equipped space truckers try and bring one back in a haphazard fashion. They would have sent in a special team designed for recovery, isolation, and study. Right? Think about it. As a corporation, if you want something that badly, you'd want the job handled by professionals with solid equipment and training for that kind of thing to work with.
I very much doubt they had specifics beyond
"There's someone talking out there in an alien language. GO THERE." And then once there, the Special Order came into effect for Ash. It was a numbered order, remember. They probably put hundreds of them in there for all possible eventualities.