A system and method incorporating a multi-function printer, a mobile device and a server to effect payment of MFP services. The groove arrays comprises first sub-grooves having depth and pitches decreasing in magnitude as approaching from an input end of the block to an output end, and second sub-grooves formed alternately between the first sub-grooves and having the depths and pitches increasing in magnitude as approaching from the input end of the block to the output. Plates may be supported within the housing through which the light passes in which the plates similarly include reflective and non-reflective surface. The combustion liner has an LD ratio of in the range 1\u2266LD\u22664, and a ratio of the combustion zone volume to heat energy flow rate Q in the range 0. Various embodiments also provide content scoring andor other prioritization techniques for optimizing exploitation of the delaycast queue. By comparing the measured values of the second parameter with a second settable boundary value, the first settable boundary value is changed upon reaching the second boundary value by the second parameter.