<p>Each loot bonus, except by the <a rel="nofollow" href="https://tibia.fandom.com/wiki/Gut">Gut charm</a>, makes an extra loot set to be generated for you (out of the loot pool and based on the drop rates). The same applies to the <a rel="nofollow" href="https://tibia.fandom.com/wiki/Wealth_Duplex">Wealth Duplex</a> bonus.</p><p>You can easily test it with creatures that have loot with 100% drop rate. When killing such creatures, the amount of extra items that are always dropped will be 1 for each active bonus. However, this is will not true <u>always</u> be the case for drop rate values different from 100%.</p><p>As far as I know, <a rel="nofollow" href="https://tibia.fandom.com/wiki/Gut">Gut charm</a> adds a 20%-chance of an extra loot set to be generated for creature products, which means for every 5 creatures that you kill, you loot the amount of creature products you would get in 6 creatures (20% bonus), in average.</p>