Starchart Purger shouldn't be usable on shared planets as they are temporary

Getting too many Subspace seekers. I keep giving them to people but they are coming in too fast. Approx 60% of my artifact points I harvested was for subspace seekers. Perhaps a mission that make players turn in subspace seekers? If nothing is done, subspaces would be the most scrapped artifact and the artifact points "wastage". Also, 150 scan ain't a big thing for bigger scanners.

1. I agree about the shared planets thing.

2. is it possible to use more than one seeker at a time?

3. you can keep a few for when you do planet scans, hacks, or finding well-cloaked fighters.

4. the benifit is that even though they may be worse than top-grade scanners, when active they use no space at all, even when you have those sensors installed. That gives those big scans a little extra kick.

5. If they really are that common, a mission to use them would be a great idea. How about a mission called 'explore subspace'? On completions it can grant random new things: a special ship module called 'enigma drive', a building chassis 'subspace portal', or finding a subspace planet!

6. also, subspace seekers are more expensive than terraformers, so if you are getting more of them then the terraformers, then I suggest to Dan changes to artifact chances.

No, they don't stack. If they do, then I would just use 20 in the next scan blitz

Yes, but what would you do if you get 20 subspaces before your scan blitz? I got like 1-2 every 12-14k harvest twice in a row

maybe you are just unlucky with artifacts. I personally haven't got any subspace seeker in a while. But I have no use for them anyway