Point 2. reminds me of some old Eliezer's posts, like "Purchase Fuzzies and Utilons Separately"[0]. It argues that if you're clear and honest about your intent, you'll be more efficient. Using an example of helping others, if you seek both the "warm fuzzy feeling" and actual effect on the world, then the best approach would be to get them separately - e.g. buy the feeling cheaply (e.g. do something directly for someone in your community, maybe help an old lady cross the street or something), and then dump the rest of the money into a maximally effective (in terms of $/impact) cause/charity.

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[0] - https://www.lesswrong.com/s/pvim9PZJ6qHRTMqD3/p/3p3CYauiX8oL...