Question about Rosa's Lo$ and Penny Wise

[Daniel van Eijmeren]

Friends and I are trying to think of any reasons why Rosa decided to 
ignore old Miss Penny Wise (WDC 164) in the 'Life of $crooge', even 
though Penny has a big influence on Scrooge and his entire fortune.
She appeared in 1954, only one year after Glittering Goldie (OS 456).

So, our question is:
What Barks-fact (or Rosa-fact) made Rosa decide to ignore Penny Wise?

--- Daniël