Many Wyndham owners find this concept hard to fathom. They know little about converted fixed weeks in general, assuming that all Wyndham resorts started out as points and expect all MFs at a particular resort to be the same.
Wyndham as a timeshare entity transitioned from a fixed week basis to a points basis. For that to happen the fixed weeks owners, all paying the exact same dollar amount in MF's, had to be allocated an amount of points reflective of the value of their ownership. Prime summer weeks would roughly be allocated twice the amount of points as a mud week. Since they were paying the exact same amount in MF's, when expressed as a $/K figure, as is done for comparison purposes, the mud weeks suffer in comparison.
For example, assume all fixed weeks owners pay $850 in MFs, mud weeks owners receive 84,000 points per year, prime weeks receive 168,000 points per yer. Mud weeks are paying $850/84 or $10.11 per K while summer week owners are paying $850/168 or $5.06/K.
This mechanism still exists with Wyndham today and is used when other systems have their weeks converted to Wyndham points. The Shell conversions currently going on seem to be of this type.