I think the approach is different because there is a big difference between promoting a casino and promoting a blockchain. If the casino catches 1 customer who deposits (and lose) several thousand dollars, it gets a return for several weeks of the campaign, and if blockchain catches 1 person in this way, it gets 1 node more - close to none impact of value of project and no return from investment. even if it is 1 more investor, the investor expects profits and can sell at any time, the gambler cannot sell his loss and get some of the money back.
Maybe that's why signatures are mainly paid by casinos and crypto mixers and not by cryptocurrency projects, and those projects that pay for campaigns here on the forum do it in the form of bounty, paying with zero-value tokens mostyl before the ICO.
There is no harm in trying it in the long run to see the traffic obtained from this forum because of course it is necessary to introduce more about this project to everyone in the Bitcouningk Forum, not only relying on social media, seeing validated users decreases from time to time and Maybe Idena needs a new breakthrough to make it better even though the crypto market is still not so good.