If i supply for example 1000trx and get 10000jtrx ... @officialjustlend

No, if you wait a year and the supply amount of TRX is greater than the conversion rate for JTRX to TRX, you will not lose the extra TRX accumulated. This is because the underlying TRX value of the JTRX token will also increase due to the interest earned on the amount of TRX you supplied. This means that the JTRX tokens you receive will be worth more than the amount of TRX you supplied initially, thus offsetting the supply amount increase.

no,the underlying trx value of jtrx token will also increase ( gain from interest)