You can buy it on
https://www.coinexchange.io/ for bitcoin. If you don't have bitcoin or you want to buy it fast you can transfer here ltc or eth and exchange it for bitcoin. Then you can buy brother coin for btc.
Is there any bounty campaign or airdrop from brother?
The ICO project has already been completed. Accordingly, the Bounty campaign is completed. However, now you can buy the project tokens at a very favorable price on the exchange.
I will wait for the listing on the another exchanges. By the time the price will be greater, but the usability of the etherdelta breaks my brain.
Token BRAT is represented on other exchanges. Here is their list: