# Is it possible to stop the consumption of rare resources?

The Tradepost note mentions that it reduces rare resource consumption by 4%. By my calculations, 25 Tradeposts would mean a 100% decrease to rare resource consumption.

Does this mean after building enough Tradeposts, resources like furs, spices, and ivory will stop being depleted by default?

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No, it is not. Part of the game code includes the following:

getHyperbolicEffect: function(effect, limit){
var absEffect = Math.abs(effect);
var maxUndiminished = 0.75 * limit; //first 75% is free from diminishing returns
if (absEffect <= maxUndiminished) {
//Not high enough for diminishing returns to apply
return effect < 0 ? -absEffect : absEffect;
}
var diminishedPortion = absEffect - maxUndiminished;
var delta = .25*limit; //Lower values will approach 1 more quickly.
// The last 25% will approach .25 but cannot actually reach it
var diminishedEffect = (1-(delta/(diminishedPortion+delta)))*.25*limit;
var totalEffect = maxUndiminished+diminishedEffect;
return effect < 0 ? -totalEffect : totalEffect;
}

This function is used in basically every case where the value of something is a reduction. Thus, the bonus from Pastures, Tradeposts, etc. is run through it. A few seconds in Excel gives the following chart:

In essence, up until 75% reduction, everything works exactly as you would expect; ten tradeposts give a net reduction of 40%. Past that, there is a sharp curve of diminishing returns; every new Tradepost is still improving the consumption rate, but by less than the one before.

There is hope, however, for two of the resources involved. Once you unlock the Mint building (requires Architecture), it will provide Furs and Ivory in exchange for some Catpower; by that point, you’ll likely have enough tradeposts that just a single mint running will give you a net gain to both resources, allowing them to stay above 0 while idle for long stretches.

As a note: This function is generally not used anywhere the bonus from something is an increase. So, e.g., the Workshop boost to crafting effectiveness can stack forever – get a hundred of them somehow, and you’re getting +600% crafting power.

I have 29 tradeposts and while my consumption is now very low, it is not zero. With my Mint turned off and 57 kittens, I consume 0.27 furs, 0.19 ivory, and 0.03 spice per second (note, that’s NOT per tick). With a single Mint, my fur and ivory production are positive (Mints don’t affect Spice). On average, when I find spices once while trading, they last for 45 minutes to an hour, so I can get enough easily to keep my happiness maxed out overnight.

Proof, possible spoilers for mid-game stuff.

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