If the manufacturer trades in poor products and on the platform, buyers will start to give bad reviews, then the project will cease to cooperate with such a businessman?

It's true. Directly you can buy a small quantity of goods and intermediaries still add money to their price. As a result, many products are not affordable for all buyers.

I also hope so, I bought the project tokens and got 30% of bonuses.

Force majeure circumstances, additional software costs, hiring of highly specialized specialists, if suddenly we encounter problems, etc.

It depends on many factors, the category of the parcel, the EU country, the minimum threshold for the value of the parcel, purposes of use. For each EU country, the cost will be different. Due to these factors duty-free parcel cost limit will be constituted.

Yodse token – is an element of the ecosystem for the user loyalty promotion, because it gives its owners such opportunities as:
1) make proposals on improvement of capabilities, functionality and operation of the ecosystem;
2) pay for industrial goods;
3) pay for marketplace services;
4) participate in the referral program and gain income from sales;
5)pay for contractor services, such as translation of texts, video clips recording;
6) content writing, development layout and product package design and similar services aimed at increasing sales of product manufacturers.
As for discounts, according to tokenomics, that you can find in the section:  Ecosystem model and participants in White paper: https://yodse.io/doc/en/yodse-en-whitepaper.pdf  fees for the ecosystem services in Yodse tokens are lower than in other types of currencies:
1% of transactions in Yodse tokens.
1,5% of transactions in crypto- currencies.
3% of transactions in fiat currencies.