There is a thread on CC for Brazil players who were Neteller maybe some interseting info for you. Thread here -->
https://www.cardschat.com/forum/poker-deposits-withdrawals-54/attention-brazilian-neteller-360105/
Ecopayz and Brazilian Promotion found here but it is for the ecoPayz plastice card which you can get for free right now -->
https://www.ewallet-optimizer.com/brazil-skrill-and-neteller-leave-ecopayz-arrives/
With respect specifically to their virtual cards they are only one time reloadable. Once you buy it and load it you cannot load any more funds to it. Once the limit runs out it is no longer good and have to purchase a new one. I think it is $2 USD something for one. I would recommend going with plastic card you dont have to load funds you can use it and the funds comes out from you ecopayz account. There are fees associated with using the cards though check their website for the info.
Also you should be able to deposit and withdraw to Pokerstars and ACR directly without using a ecopayz card. Both Poker rooms have ecopayz integrated so no fees.