It applies to the only unit that's explicitely described in the agreement !
Each agreement is for only 1 type of unit. The way you get it is of course irrelevant : whether you build, buy or earn them from quests, you get boosted units, of course ! They also add to veteran units, etc.
Only the champions and heroes can't be upgraded as they don't have any matching agreement.
If you're totally sure that you don't have any, then please contact our Support Team for the investigation.I have a problems that I cannot update an agreement because it says that I still have an impending agreement update, while I currently hasn't yet update any agreement.
What should I do?
Ok - I like to have 'my ducks in a row' and so a quick question ... on that basis it's 38% for level 20 and so how does it become 40% ? Is it simply another 2% when the agreement is finally signed, so to speak, after level 20 ?Yes, +2% per agreement level after level 1 (that just unlocks the unit), stacking up, so when you're at level 12, you have a 22% bonus to each relevant unit's offense and defense values (it's level 11 for 20%).