Questions about SuperTerminal

[alocritani]

version 7.009
I've just conquered a planet with a superterminal and I've some questions:

In terminal's description I read that every 15 seconds it will reduce my AIP by 1 and increase AIP floor by 0.2.
but in my game the following messages appears: +1 AIP progress from superTerminal -2 AIP from superterminal

My idea is that it's related to the hacking progress count:
If I understood correctly Hacking Progress is total AIP (before reductions) - Hacking Progress spent.
Using superterminal is 1 HackingProgress/tick (for first 20 ticks, 1.5 for next 20 ticks and so on)

So Adding +1 AIP equals to +1 HP but hacking superterminal reduce HP by 1 = no HP changes. now -2AIP from superterminal hacking brings the total AIP Reduction to -1 (as tooltip says) /tick . Using this system the HP doesn't changes while AIP decreases.
This thing changes when you go over 20 ticks: in that case every tick will remove 0.5 Hacking Progresss (because of 1.5 cost)

This is my interpretation: can you confirm that it is the right one?

Thanks!

[Draco18s]

Floor is 1/5th total AIP ever gained.

It works out the same, but that's how it does it.

[Bognor]

Floor is 1/5th total AIP ever gained.

... At difficulty 7.  At 8 is 1/4, and at 9 or above it's 1/3.

alocritani:  I think you're right about how ST hacking interacts with hacking progress but can't personally confirm.

This thread may be of interest: Is SuperTerminal hacking still worth it?, though it's from before the hacking changes and is just about the effect on AIP floor.

[alocritani]

Thanks for the link, very useful!

edit: Now I'm start doubting that the "free" hacking for the first 20 ticks is not intended... but just a side-effect of the mechanic.
What are your consideration about it?