If one has to explain a joke then either they're bad at it, it's a bad joke or they have the wrong audience....I'll leave the conclusion as to which is it to the readers :)
The article is about making money (even from the title)..the commented upon line is insinuating that if you think the article isn't for you (ie you just randomly stumbled upon it), then you obviously are not interested in making money...sarcasm :)
Well done, and thanks for sharing your insight. Small gripe, I found this line in your article's opening remarks a unnecessary - "If that doesn't ring a bell, then please ignore this and go about your life a few million poorer."
The article is actually useful, despite the annoying introduction line of `a few million poorer`. People could stop reading the article for whatever reasons.
A bit of feedback on your landing page:
Something about "hyperlocal incentivization" caught my eye and I was thoroughly confused. Then read the whole paragraph and actually laughed out loud.
The next thing I did was actually look at the products, because you'd got me in a good mood.
FWIW this sort of email triggers my immediate shutdown reactions in several ways: use of "Hey" greeting from some unknown non-friend, general (albeit here not total) avoidance of first-person pronouns[1], phony-baloney specificity in time and duration for an initial meeting.
[1] "Saw your email," "Would love to hear more"--no, avoiding "I" does not make the writer appear stronger.
This line is distasteful and detracts from the rest of what you wrote.