The average person is exposed to over 1000 ads a day. Go ride the subway and try to remember all the ads you saw and let me know how that worked.. What incentive is there for nostr:npub1sg6plzptd64u62a878hep2kev88swjh3tw00gjsfl8f237lmu63q0uf63m to advertise a protocol? Also there is more then one nostr app lol. How do you know which ones aren't going to be bad actors one day? Imagine throwing money at ads for an app that might turn out to be evil lol😆. I personally prefer amethyst over primal just from my experiences using both clients. I'm not saying nostr devs are evil but I don't belive all of them maybe 100% all good lol.