Pull a Google?

I mean many of their actions, on the surface, could be euphemistically called "helping humanity" when in reality they're only helping Google.

Penalizing non-https sites: "we're making the web more secure" - and lock out advertisement surface to the benefit of our ads quasi-monopoly (admittedly, a weak case though)

Android Stagefreight bug: "we're disabling MMS to protect Android users" - and by the way close a channel for easy publishing with carrier billing that is part of the highly regulated 3G/4G stack

HTML5: "we're advancing the web and make it fully portable" - and also capture HTML standardization and make it so overcomplicated and never-ending that even MS (and long-time pioneer Opera) are forced-out of producing web browsers alltogether

A Trojan horse?

I’m not sure about a term, but the Underhanded C Contest [1] is (another) great example.

[1] http://www.underhanded-c.org/

Perhaps a 'ruse' or 'slight of hand'?

Wouldn't that be a Trojan horse?

Ampification

"Evil"? Is that the word you're searching for? Here, let's use it in a sentence for context: "Google is Evil." Yeah, that seems like it fits the billet!