I agree with what you quoted... However, this explanation only describes repairable items and does not mention ammo or craftable items. It does not explicitly say that these are handled any differently as far as "decay" is concerned...
You can turn things the way you wish...
They say they make money from decay and fee...i quote what they call decay... i can give you quote of the fee ( it say auction and shop fee , but i guess also flat fee)...
for the rest , it should be back in economie...
I dont know for fact how it work , i am not the one that code entropia...
I can just quote what MA write , after you decide what you want...
MA say , they share 50/50 they income with planet partner , and that income is decay and fee...
They dont speak about crafting material , or amo , or fruit , or sweat , or....
also your comment sound to me like what we can see about american lawyer...they need to have all detail explain explicit, not because they are dumb , but just because they are snake chacal...
In the end , it make all the eula , rule and contract for what ever impossible to read or to understand for human...
I got my internet ISP contract send me again last month...Its 3 page full of text write in 5pix font...
That must be 20 or even 30 page of normal text...All write in lawyer language...
After 1 hour reading , i still dont know the basic information i want to know as user : WTF is the guaranti speed of my connection...
Maybe one day , MA will make list of all item , with all diferent cost and say what go wherer...but i guess they have better to do right now...