The vision of the Dafzo is to create a simple and affordable logistics ecosystem for the Global community.

You are right. Firstly I saw a warning  about the restriction for us resident when open registration page. But then I read more info in white paper where you wrote "us citizen cann be participant if they will become the accredited investor.
Thanks, that showed the mistake

The minimum contribution amount is 0.10 ETH and contribution can be done by visiting Dafzo's official website https://www.dafzo.io

No, You can contribute in Dafzo by BTC but for receiving Dafzo Token you need to have the ERC20 compatible wallet.

promotional program on this project using bounty campaign, but I do not see the allocation of funds for bounty campaign, and also when the ICO will begin, whether it will be continued ICO after presale is completed?

The minimum requirement for investment is not so great, I'm sure everyone can contribute with this project. and yes, has Pre-ICO now started? I am interested to contribute some ETH for this project.

Thanks for the compliment. You can join Dafzo's official Telegram channel https://t.me/dafzo and be the part of the Dafzo community.

Interesting that you did not notice it: "Dafzo is opening a bounty program, with a bounty pool equal to 2%. In other words, if Dafzo’s hard cap is reached (all tokens are sold), total tokens available for the bounty pool would be 14,00,000 DFZ tokens."
This information is written on official bounty page https://bt.irlbtc.com/view/2948541.0

Yes, pre-ico is ongoing now and it will end April 30. If I know right you will be able to get bonus (I will not name the exact number of the bonus, I'm afraid of making a mistake. better look in white paper https://www.dafzo.io/assets/Dafzo.io.pdf.

Can you name the benefits of your logistics system?