As I understand it, the support of the community is not yet implemented. Does the exchange itself work without chat and ratings?

This is interesting idea to launch ICO after launch of a working product surely it will encourage the big investors to invest into this project. Exchange platform is looking cool and nice with attractive layout. I hope in future this will become more popular.

Yes, we already have a bounty campaign.
You can check it here: https://bt.irlbtc.com/view/4583321

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I like the idea of having a buy back initiative from the team itself, this would certainly help this exchange's native tokens to gain more value when more and more tokens were burned after being bought back. I wish nothing but success to this project but as where we are now, this is a tough market to get in since there is a lot of competitors who already rooted deep and gained tremendous amount of users and day to day traders. I hope the team is equally prepared for this.

2.5 % of total supply 2.5 millions Nebula tokens (NESC) is allocated for the bounty campaign.
this will attract the attention of bounty participants with such a division.

Yes, don't bother about the bounty because if the company has more reputable and has more features definitely community will show more interest towards the project. There are many companies launching the exchange most of the features they are giving as common.

Projects related to daily operations with cryptocurrency are always well received by the crypto community. Especially if they solve urgent problems. Nebula also solves a whole layer of problems of projects, and traders, both experienced and beginners. And it is doing it right now, because Nebula has the product ready. It should be noted that the preparation of this project is carried out at a very high level.good luck