From the Ecopayz website fees disclosure:
http://www.ecopayz.com/en-GB/Fees-*******
"Forex Fees Whenever a currency conversion is required to complete a transaction, PSI will automatically calculate the currency conversion rates and add a currency conversion fee 2.99%
So spending US dollars from Ecopayz in the Canadian economy actually costs 2% + 2.99% = 4.99%
Like I said though, if I can withdraw winnings from a book back to Ecopays and hold funds there for future FREE deposits back to books then it has value and is comparable to other E-wallets.