SAN FRANCISCO--(BUSINESS WIRE)--Boku, the global leader in carrier billing-based mobile payments, announces that its technology will now be offered by Optimal Payments Plc (LSE AIM: OPAY), a leading global online payment solutions provider. This will be offered through the NETELLER® service: a fast, simple, secure platform for businesses and individuals to move money online. NETELLER customers can now top-up their stored value accounts by charging the purchase amount for goods and services dire