This is it. This proves that as you upgrade you will get less plunder. For all you ppl repeating the "you got stronger" message. This deosnt make sense at all. I dunno how to quote so I paraphrase BB's post He has i think certain L4 T1 and some L2 T4 buildings. When he upgraded to L3 T4 and/or made a L3 T2 guild. His plunder DrOPPED agaimst TMH.!! Now TMH is as strong as an osf far far stronger in terms of stats than BB. How is it that after he upgrade, he gets less against a monstrous target?? Now let me recap for all of you how pre-T4 days worked. Osf 324k. Player 1 WA + 23 guilds lvl 3 would make about 7 mil in ally plunder. Now the player upgrade all T1 lvl 3 to lvl 4. He now makes 10 mil in ally plunder. Now if he got stronger and osf stayed the same. Shouldnt he be making LESS?? well NO. He made MORE!!!! That scenario I myself experienced as a hansel build. If upgrading means less profit then it is NOT worth plunking down 27 bil and receive a 100-200k drop in income.
The l3/l4 t1 ha to do with actual possible plunder for the buildings versus the strength relavancie... The increase of plunder from a l3 to a l4 has more weight than the difference in strength.