Online, a search for Madeleine McCann yields 1 630 000 hits. A search for Matthew Ohlsson - a mere 63, of which not even all are the missing Matthew Ohlsson.
Perhaps the worldwide media hysteria fanned by the wealth of Madeleine's parents benefits other missing children too, but I suspect that once Madeleine is found - dead or alive - much of that attention will revert to where it was before, and the chances of Matthew Ohlsson - or any of our other missing children - being found as a result of the renewed energy and focus will be minimal.