I did not know that they plan to run another bounty campaign. First one was on three forums, nearly dead altcointalks and cryptotalks, and here. Here, I havent noticed their signature being here and there. I would suggest them to concentrate only on this topic and only on signature campaign. Twitter and facebook are nice places to gather attention and new users, but bounty hunters mostly share all the info among each other. So it is quite ineffective. Those who wanted, already registered there. I have noticed that on bitcointalk number of signature campaigns that pays in Bitcoin have decreased. So running a campaign with small payment will also do.
I don't think they will run a new bounty campaign soon and I don't think they have the funds to run a BTC signature campaign. Till date there are quite a lot of very long ongoing BTC signature campaigns so it will be difficult to really stand out.
It does not have to be a classic form of bounty campaign, it can be kind of contests or some form of airdrops. It is true that there is a lot of competition and there are also many signature campaigns, but without a large marketing campaign, unfortunately, they will not be able to attract players and probably will not stay in the market for a long time.