Wouldn't that mean that you would get PAID to level early on?
* Keep in mind that you can always ramp up the cost later on.
* Maybe I could add a power component to increase cost exponentially. (Although that makes the math more complicated for new users.)

* Keep in mind that you can always ramp up the cost later on.
* Maybe I could add a power component to increase cost exponentially. (Although that makes the math more complicated for new users.)
An exponential formula would be very handy. I could always ramp up the costs later on, then again, I could just type every level into the console manually and not use a mod at all.

As to getting paid to level, no, not necessarily. For instance, I've been testing various settings to simultaneously do two things:
1) Make the earlier levels move a bit faster without changing the overall structure. In a FCOM type environment, the first couple of levels are just tedious.
2) Make the later levels move a bit slower as the item values ramps up. Using gold as a common gained currency works pretty good, but does present a few new problems.
One such setting I've been messing with, and have grown to like is a base cost of -400 and a per level cost of 200. The progression is therefore like this:
0
200
400
600
etc.....
Notice that this progression equals the default value at level 8, and the total net spent at level 14. But by level 40, it would have cost about 26,000 more. (The other settings I have liked, and may ultimately decide to use is -450/225. It hits default rate sooner, but with a much higher later cost.)
Given the way this mod functions with that "free" level early on, the 0 cost to initially level is not a problem (I always rest and then manually decrement that level, anyhow). Or, I suppose in game terms, one could consider that the "tutorial level" so commonly found in games.
Either way, it's handy for setting up leveling curves. The problem with using money is, as usual with money, once you have it then it becomes easier to gain more. The strictly linear structure of the mod can't really account for that as well as I'd like, without either "cheating the system" at various times or setting up an offset like this.