itch.io

That wording in the terms of service is to prevent someone from changing a few lines and then sharing my plugin in a public way for free, or for money. You are free to commission someone else to make changes to the plugin for your own use. That person (or you, even) can even sell those modifications, as long as they are made in a way that in order for someone else to use them they also have to own the original plugin. 

Basically, to share them, they need to be made in the same way the recipe list extension works; it doesn't work on its own, and requires my plugin to function.

You can share the plugin privately with someone else to get them to make the required modifications for you, if you like, as long as they don't then go on to use the plugin in their own projects, or share it with someone else who does. Realistically, I don't have any way to stop anyone from doing this, of course.

Currently the traits do not have any mutating ability, and there is not currently a way to make the trait do something random, however, they are programmed in a way that an addon can add different traits to items that weren't included in the base plugin, so it would be possible to extend this functionality to include evolving traits, or random traits as well. Traits that are on an item don't actually do anything on that item, though, so you can hide traits on base ingredients that only impart themselves onto the result item. Trait chaining would allow that result item, if used to create another item, to pass any traits it already had on it to the new item as well, though.

So if you had a fire essence as an ingredient, it by itself could have the trait to add a fire skill to any item it was an ingredient for. Also, the result could be a piece of equipment that has the trait "learn skill x" on it, where wearing the item gives the actor that skill, or it could be a usable item that just teaches the skill to whoever uses it (there are separate traits for that). You could also have the fire essence do both traits at the same time, so it could create both a skillbook type item which teaches a skill, and if you use it to make equipment, it could have the skill on it when equipped.

Unfortunately, as I said, there's no way to make the skill given be random, or belong to a pool, or evolve, but there is always the ability to add traits of your own via plugin extensions. And an evolving trait like that probably wouldn't be too difficult.

~Ramza