Ok folks, first test.... SUCCESS!!
I fixed the problem with CocoonJS Ads and "Hide banner". Right now in my tests if you use "hide banner" in "on start layout" the banner doesn't appear again. The only problem is that the first call of the banner doesn't work (the banner is not showed in the first "on start layout-> show banner" but works in the next layout).
We need more tests, so if someone want test it, here is what i did:
-Open Runtime.js from cocoonjs plugin folder
-Comment or remove the lines 90,91,92,93,94 (its an "if)
-Save the file, open construct2 and compile.