Does selling survey data to Vladimir/whoever net you more money than just selling it to the other vendors? I have to admit I've only ever just, you know, flogged it to whoever.
Vlad pays more and has more credits, but he will still run out of money quickly if you are someone who surveys a lot of things
You can hide the ball too long. Vanguard line has mystery and twists and there is no doubt what the core idea or stakes are after the first non-training mission. Which is a very memorable level that's also riffing on Aliens.
Yes, vanguard sells you core mystery of "Where do Terrormorphs come from" early. Just like Constellation sells you "What are the Artefacts?".
Imagine if the game did what you propose. Instead of giving a mysterious warning,
Emissary just flat out tells you what is happening. That would utterly break any sort of mystique. Entire point of Main Quest, at least if you do it "normally", is to question and speculate before finally getting some answers.
Also, your argument doesn't exactly gel with this.
Constellation, you can be on your fifth core mission if you do "Into the Unknown" last before you
Like, how can you say this is "too late"? Also, there is the fact that you don't need to actually complete main quest to find
the temples, you can just randomly stumble upon them.
Also, let's take a look at this quest line up? First, we got mission to meet Constellation. Then we get introduction to Sarah and mission to find Artefact in Sol. Then comes Empty Nest, which is Sams introduction and, assuming you didn't wander off, your introduction to Akila City and Freestar. After that is Back To Vecetra, which sends you to get Barret. After that is Into The Unknown, the "official" introduction to
the Star Powers
Comparing this to, say, UC Vanguard quest, we would have Supra Et Ulta (coincides with intro), Grunt Work (coincides with Old Neighborhood), then comes Delivering Details, then Eye Witness, now you got Friends Like These and only now, on the 6th mission we get The Devils You Know, which is where the major twist happens. Even then, it's only on Hostile Intelligence, the 8th quest, where you actually get rundown of what is happening.
Which, funnily enough, is pretty close to where Main Quest also starts to give you rundown on what is happening.