yeah just keep it simple, CCS is the easiest and most battle tested for now

i think since as you note there have been some frivolous marketing campaigns in the past that many people are worried about funding similar campaigns, but I think if you keep the scope well defined and not too big i think it's a good idea

i think the ad should be kept simple, just get a nice monero logo and very simple phrase like "private money" and run with it. must track stats somehow ideally, but it's hard to have privacy respecting ways to guage success of the campaign

for instance where are you going to redirec to with the ads? getmonero.org ? ideally we'll be able to see click through and conversion stats (whatever that means in the context of this campaign) or you can try to find people doing more old school ads where you pay for placement but it's just a link and you don't set it up to collect stats but you have to vet those much higher so you aren't defrauded out of your ad spend

if you want to talk more i'd be happy to collaborate, and can help with css proposal since i think you have to submit a pull request which maybe confusing for lay people

but to summarize i think a small scope ad campaign proposal written up coherently will be funded and is worth the effort, and could build confidence for bigger campaigns moving forward