OK I’ll give it a go.
For anything game development wise to make sense requires context as to filling a need and our need was for a framework that all our player character models can hang off of and of course at a low cost.
At the time we started looking at possible solutions the only framework with available ready made assets was the Epic base rig that based on it’s design, rigging, as well as scope of use was rather limited to characters of stylized construction with little or no features beyond the use in a typical run and gun.
Of course our game is run and gun but we were interested in features that would allow our character models to act as to non-game related systems, menus for example and characters that could express besides a dead pan expression.
To finish off being a fan of Daz Studio from the start I knew the value of some of the tool sets available that could be used for game development and looking for a character framework solution Genesis3, as a product, came our after Unreal 4 was released and really did not become functional as to fidelity of asset until after the UE4 4.15 release. Ather 4.15 we started the process of evaluation of worth as well as fixed costs as to paying for the Daz Original Developer License and the saving in sweat equity alone was well worth the licensing of just the Genesis 3 framework.
I could go into a lot more detail of just what a framework is as applied to digital characters but as a fixed cost of $350 to have fair use of of just the Genesis 3 framework is a huge savings in both time and cost as compared to custom or sourced solutions as to general use frameworks, (Massive for example).
Pulling out the calculator first off to cover our artists need we need access to at least 3 seats of the host application and in the future a lot more. The base price of Daz Studio, necessary to access Genesis 3, is free no mater the need be it 1 seat or 1000. Genesis 3 has a fixed start up cost of 0 and once again we need 3 copies of the framework to cover our current needs.
At this point the calculator reads zero as to working assets in hand and since at some point we will release a product that requires the access to the working assets in an interactive manner the requirement is to included the CRT derivative as part of the package and purchased the DODL rather than waiting until seconds before delivery which we could have done as an option.
So at this time our calculator reads $350 as a fixed cost, as a one time fee, it’s time to amortized the actual cost as to use ( with in context once again)
OK so to make maths easy we plan on delivery day to have at least 10 player models so simple maths lest take $350 and divided by 10 which = $35 bucks. Got to love fixed costs as the more player models we included the cheaper the per model costs becomes but better still since all of the clothing components and body elements we make is a derivative, becoming original and transformative, so at this point we might as well throw away the calculator as we can sell some of our art and what was in the red is now in the black. 
As to current cost of Daz products I would suggest PA’s repackage for Daz3d, using the Genesis 3 framework for characters, but would wait to buy assets for video game use as a large percentage are not formatted for use in a video game so it’s going to take time for the Daz marketplace to settle down