Yes, transfers (sending money, requesting money, transfers between own cards) are limited by daily thresholds per card, both in amount and value: 

➤⠀ for transfers in RON: minimum RON 5 lei / transaction, maximum RON 49,999.99 / day / card, maximum 20 transactions / day / card; 

➤⠀ for transfers in EUR: minimum 1 EUR / transaction, equivalent to 49.999,99 RON / day / card, maximum 20 transactions / day / card. 

Therefore, the total amount of transfers per day must not exceed 49,999.99 lei. You can also transfer money via BT Pay to another BT individual customer, as many times as you like, up to RON 49,999.99/transfer, but not less than RON 5/transfer. 

All you have to do is choose the person(s) from your phonebook or manually add the phone number you want to transfer to and fill in the amount you want to send or request. You can also transfer money between your cards if you want to use a particular card for shopping. It's good to know that if you have your accounts linked in BT Pay, the transaction limit with your card/account is 50,000 lei/day. You can see the full list of fees here.