I'm restricted by Google Adsense's Terms of Service as to what I may disclose so I must choose my words wisely.
Kinda sums things up - on top of relevance to the audience, where the ad is and who is seeing it really matters.
I think it's safe to say the ad shown to the members does not perform nearly as well as any of the ads shown to visitors. The member ad does still get the occassional click though - so ad blindness to "regulars" is not absolute - it just significantly hurts performance. Ultimately it's the visitors that pay the bills when it comes to TFSA. (And for the record I'm OK with that - please don't go changing any habits to "help" because it can inadvertently cause problems.)
Hopefully that'll help you evaluate where you're planning to advertise (at least add a little to the picture).
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