Trading a 3x architect vs an additional building plan pretty much only has benefits for ILS:
a) ML is less likely to attack them and take it by force while killing a good amount of defense of ILS, no matter if they're successful or not.
b) Cows will be forced to throw more hammers on ML due to 3x architect. Which means less hammers can be hold back to knock down ILS later on.
c) ILS themselves just benefits way more from having an additional BP as backup instead of an arte that doesnt really add any value to their ww defense and would also require additional resources or troops in order to be moved or defended.
Who knows if ML and ILS really worked together.. But bringing up this trade as some kind of proof is just silly if you spend 5min of thinking about the pros and cons for them.
As for the artes brought to cows by their friends. Feel free to share the benefits for the previous owners as well.
Seems like you're the only one here with an ability to read a complex situation in a critical manner and reach the correct conclusion.
ILS played practically solo this entire server, we started as a small group from Israel of 45 players and then continued to recruit.
An 80% recruited ally was able to be in a leading position in the WW race, it took 3 Cow allies, StayHome, LoL, VR, RoTeam1+2, NewOrder and BK to fight that, we stayed true to ourselves and continued as ILS without any help from other allies.
If it took 486 players together to beat us, I'd say that's a bit embarrassing for you cows.