Direct answer
Yes. Russians were quoted separate fees for opening and maintaining an account in Uruguay: $100 to open the account and $20 per month for maintenance. This should be treated as a regular banking expense.
These amounts matter for more than just their face value. If an account is kept as a backup or used infrequently, the monthly fee quickly becomes noticeable. If the account is used actively, the fee should be weighed against the benefits of access to a local card, transfers, and banking services.
Before choosing a bank, it makes sense to create a table of all fees: account opening, monthly maintenance, card fees, cash withdrawals, transfers, and currency conversion. One free or inexpensive item does not mean the entire banking package will be cheap.