You should definitely work on creating a proper T&C agreement that covers everything about your offer and services in the same way that other casinos have done it.
They have a faucet you can claim once a day. Read the help page for more information.
As you said, there is no airdrop or bounty, but we could start a campaign here on Bitcointalk and there is always the affiliate system which is also going to be improved for a more rewarding program.
Regarding the T&C since it does not include terms related to licensing, KYC, etc. It may be shorter than other casinos, but it includes the main and important information. I have requested that details on deposits/withdrawals be at least added, and we will improve the whole thing in the meantime, thanks for your suggestion.
If you are thinking about signature campaign in this forum, you should consider it running for several weeks not only a week or couple of weeks.
Before doing so, much better if you will do other improvements in your site, as by looking at it, you still have a lot to improve on. Pls add FAQ also.
You can't expect something would drastically change upon introducing your campaign, as it would take time before the players will notice your site.
Also, look for other marketing promotions that you believe are more sustainable in the long run. A regular contest may keep some of your patrons.
Correct no instant result will come for just running a campaign for short time span only it really need to have consistent marketing to get the best result. If they just do that where they only plan to run their campaigns for 1 or 2 weeks only maybe they are not doing that very well and might they are just throwing money because it will not result anything. They should consider scouting other casino who have long term campaigns since they can learn a lot from them.