When I put money into production research, is the probability increase only for that round, or does it carry over subsequent rounds?
Like say I invest 3 credits into production round one, for a 4% chance.
If I do nothing round 2, do I still have a 4% chance?
If I invest 1 credit round 2 does the chance increase to 5%? Stay at 4%? Drop to 2%?
Also, does the probability of getting the upgrade reset after you get it?