ok, we hear a lot about spammin to make the town money. I spam a lot of things with tintin and I can tell you that it's worthwhile: you might not have anything to show for it in the end other than a few tintin boxes, but you level up your manufacturing skill a lot out of those materials. It also benefits the town greatly - 5000[M] is given to the town every time tintin is used. 5000[M], no matter which item it is. So when it comes to bamboo, TinTin can actually be used to increase your donating dollar while giving you the chances to make a Master or Perfect Grade item in the process.
Now, let me break down the math of it for you using some fixed variables.
For my scenario, we're going to value Bamboo at 600[M] per piece, and we'll say that tintin gives back an average of 60% return.
so, I go buy 500 bamboo for 300000[M].
I spam all of it and get 60% back. so, the 50 bamboo items I spammed gives the town 250000.
I go spam my remaining 300 bamboo and my 30 bamboo items gives the town 150000. and I still have 180 bamboo left.
I spam the next 180 bamboo for 18 items and 90000 is given to the town.
Lets just say i only get 10000[M] for the town out of the rest lo
so then, l've used 300000[M] worth of bamboo and managed to make the town 500000[M], thats not bad at all
AND DONT FORGET THE OTHER BENEFITS!!I spammed about 200 thunderbolt guns on GoonZu day and tintin them all. I got 4 TinTin box from them. The chance of getting good item from TinTin depends on the level of the item you give to him. The Thunderbolt gun is only a level 32 weapon so that's not bad. After level 70 Weapon, you start to get Titanium, Aramid, and Mahogany sometimes as well.
But for practical use, go get you some bamboo. And hope for the best =D