[arin-ppml] Large hole in IPv6 assignment logic

[Milton L Mueller]

> Also, keep in mind that the maintenance fees for being an LIR are
> significantly higher than for end-user orgs; waiting a few months for
> the Multiple Discrete Networks policy may test your patience, but it's
> worth it financially.

Can someone explain to me what is the policy rationale for this price discrimination? and for maintaining the distinction between LIRs and end users? 
This is a real question, not a rhetorical one. 

--MM