Hm, evaluating all (mixed) responses to this idea, I'm convinced that it should not be me, writing the promotional texts. The idea of having a choice of content is probably the best, categorizing between 'Just a mild hint that it's possible to donate through DC' and a 'Strong, almost begging, type of promotional marketing mumbojumbo', including an even bold link to the 'Donate to me please' page. And then some categories in between. A total of 5 choices (grades) should be enough then.
That should be a good compromise for everyone.
Because of the flexibility of the Inno Setup scripting language and the Pascal Script engine, that is all quite easy
Oh, and did I mention all labels and text are user override-able? And next to that, it comes with source (has to be included in your script), and the texts in a .rtf file (so colors, bold, hyperlinks, etc. are possible), so you are still in full control.
Then for grade 1 the title above the text could be more Author-oriented, like: (Also changed the 'Userpage' to 'info page')