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What is the regular fee on your platform? 
The regular fee is 0.8% and we will launch the altcoin plan, which may be a discount on the cost.
Therefore, after this activity no transaction fee, I am sure that for a long time, you should actually pay less than 0.8%.
In addition, considering the freedom of trading for all users, we set a low current fee of "0.0005 BTC".