Tantiks seem to never defend themselves from the invasions - all their colonies have 0 troops.
After Tantiks are conquered by invasion they are still present in all charts and ISN reports.
Total amount of money can't exceed 999.94 trillion credits.
Sometimes it switches to "1qc", but then falls back.
Ships with ground troop pods are created with free troops, so with enough money you can create a 750k strong army from one planet in just 10 turns.
It's quite interesting.
Each ship initially is shown like as it has troops inside (like, 10000/10000 or 40000/40000).
Then, when you group them into fleet, they suddenly become troop-less (0/100000, 0/120000).
Then, when you order these troop-less fleets to invade, turns out that they actually have all these soldiers on board.
Unfortunately, it's one-time thing only, once the free troops are spent, you have to load them normally.
BTW, why can't I tell my invasion fleet to load troops from all my colonies in a system?
And why can't I see how many troops each planet has from system overview?
Yes, I do see troops, but only on one planet I've already ordered my fleet to load them from.