From the examples you share, I notice a trend in the semantics of the sentences.
The "to getting" examples are transitive. Since they are in a gerundive form, it's hard to see this, so I'll create a transitive sentence from them to make the point.
The Essential Guide to Getting Your Book Published -> I will guide you. You will publish your book.
The Guide to Getting it On -> I will guide you. You will get it on. ("To get it on" means to have sex, by the way :) ).
The "to get" forms seem to be either intransitive or reflexive. You could argue that intransitives are reflexive. For example, "I live in Chicago" means, "I do all sorts of things to myself so that my life happens in Chicago." Converting your sentences from the infinite forms to intransitive/reflexive sentences:
The Ultimate Guide To Get Out Of Debt -> I will guide you. You will get (yourself) out of debt.
A Quick & Easy Guide to get You Started Making Money -> I will guide you. You will start making money (for/unto yourself).
It would be an interesting study to see if other examples follow this pattern. It makes sense because the gerund form "getting" seems to be more active, and thus you are doing an outward activity. The infinite form seems less active, so the action is directed inwardly.
As for the example "A Quick & Easy Guide to get You Started Making Money," there is the valence aspect in the use of "to get someone started." Here is a similar semantic relationship to reflexivity. Someone (the writer) will act upon you with the result that you do something (make money). I want to think that this valency aspect might put it in the category of reflexivity/intransitivity. Just a thought.