From marketing perspective Tezos did a great (and probably not expensive) campaign with Ledger which worked for them and I believe it could work out for Nervos as well.
In a nutshell they did 2 things:
A. For their 1st anniversary they gave away a Tezos-branded Ledger Nano S to each ICO participant which was amazing as obviously it had a sentimental impact – you, know owning a branded Ledger with the currency you are supporting; and
B. When the Ledger support for Tezos came out, Tezos and Ledger announced a contest which was people signing up with their mails and then starting to spread the word about Tezos, Ledger and the contest via numerous communication channels (invites, Facebook, Twitter, Instagram, etc. etc) - the more “levels” one would complete (for example, sharing info on Facebook was one level, inviting several friends via mail was another level and so on), the more point he/she would earn giving them the opportunity to potentially win a higher prize. The prizes were 1K tezzies + 1 Ledger Nano X for the first place, 500 tezzies + 1 Ledger Nano X for the second place, 100 tezzies + 1 Ledger Nano X for the 3rd place and so on; going further, it was totally fine if one just filled in his / her mail address but this would only qualify him / her for Ledger Nano S draw - you can find some info here: https://www.ledger.com/contest-tezos/. The great thing that I believe made so many people participate aside from the rewards concept is that most of the prizes were Tezos branded / engraved again and people are normally hyped about this type of “unique” belongings.
Probably it would be best to reach out to Ledger and check what the results were, but at least from what I know about 40K people participated in this bringing amazing awareness about Tezos.
So if the team believes above is a good idea and HAVING IN MIND LEDGER SUPPORT IS ON THE WAY, I think what would make sense to do is reach out to Ledger and organize the same steps, i.e. give away Nervos-branded ledger to the ICO participants for the Nervos first year anniversary AND/OR organizing a marketing contest to spread the word about the project.
Would very much appreciate anyone’s thoughts on this.