have tried the three but only seeing slight differences for yahoo and google and really find adcenter less effective... google have just changed their theme, saw it's kinda' like yahoo now? don't you think? would love to get your opinions guys esp on Yahoo & Google.
i try to sign up yahoo, but it seem like does not shows ads at my country (asia), only available at canada and US area. while msn seem to hv this problem too
yes it does appear on Asian pages, basically because we've proven it (we've already tried the WW demographics)..