You will only be charged a 1% fee if you send more than $ 2,000 equivalent USD (Airusd or crypto) per month.
i. If you send $ 2000 AirUSD on May 1 and then $ 600 AirUSD on May 2, you will be charged a 1% fee on the $ 100 that is above $ 2,500 per month, so you will be charged $ 1 AirUSD to send $ 600.
ii. If you send $ 200 AirUSD on May 3, you will be charged a 1% fee on the total of $ 200 as you have already exceeded your limit of $ 2500 per month, so you will be charged $ 2 AirUSD.
iii. If you send $ 100 on June 1, you will not be charged a fee because the $ 2,500 limit has been reset.