What Arthur is saying is that there are implications to using an Interspace ID that are not present when using an Independent Trader ID.
Quote:This way we are Neutral with all of the houses and can have 5k transports at the same time.
Interspace is not truly neutral with Rheinland. They have a number of concessions there which other Libertonian corporations don't have, which gives them an advantage, but still does not make them truly neutral.
Even if you are not actually part of IC|, you will still be treated as a subsidiary of Interspace Commerce, which will influence how other groups treat you; there is no way to avoid the pre-existing player faction diplomacy. The only "true neutral" IDs are the generic IDs, including the Independent Trader ID.
I am not suggesting one ID over the other; I just wanted to point out the differences.