You can't check your current balance on RaiBlocks because it's locked. They pay top 200 claimers who reached or exceed the Threshold. Yes using RaiWalletbot is okay on exchanges but don't deposit amount less than 100 because you will lose your XRB's. You will be paid if you reached or exceed the Threshold. No, your claims is still be there it will reset once you get paid.
but its ok to use bitgrail xrb address or mercatox xrb address? I can't also check my balance on telegram bot. BTW how much xrb will I get when I reach threshold?