Snapchat are trying to become facebook. Whatsapps plan was to charge people money to use their service. Its amyones guess if that would have been successful, but it would have been far nobler than advertising.
Those plans were words. As long as they do not offer a legally binding commitment to their users never to track users/never to do ads in their software etc. there is no reason why one should consider this as more than some vague plan.
As they Romans said "caveat emptor" (the buyer shall beware). Or as is is written in Faust by Goethe: "Denn, was man schwarz auf weiß besitzt, Kann man getrost nach Hause tragen." ("That one can take back home, and use, What someone’s penned in black and white." (source: https://www.poetryintranslation.com/PITBR/German/FaustIScene... ).
That has nothing to do with nobility.
So now Snapchat's founders are noble? They did those things you mentioned and your wording is a far cry from their reputation.