I don't know whether Jeph gets paid for displaying the ads when the comic is displayed (in which case, scraping his web site will produce the clicks he needs), or, more likely I guess, for referred clicks through to the ad servers (in which case it will not).
With a bit of extra work the app could be made to do a click through to one of or each of the ads with the appropriate referer* header (thus doing better than most human viewers!), while not displaying them; this raises the interesting question of whether this is really cheating, and whether it would violate any terms of the Android Store...
(I'm presuming the app does the work, rather than having a back-end server.)
* sic - I growl a little every time I see this mis-spelling which has got fossilised into the protocol.