"The Government" is a huge employer with a massive installation base of Windows systems, many of which contain sensitive information wanted by well motivated at

"The Government" is a huge employer with a massive installation base of Windows systems, many of which contain sensitive information wanted by well motivated attackers. They would be keenly interested in new threats to those systems, the same way that any large corporation with a similar installation base and threat model would. Ask yourself, if you receive information via MAPP, you have some information which could be turned into an exploit, but it will not be useful towards a goal of hacking other peoples computers for long because, by definition, it is going to be patched soon. "Make hay while the sun shines" perhaps? The same window of opportunity is open to governments and corporations around the world (many Chinese companies are MAPP subscribes, the one leak of a MAPP exploit happened perhaps because of a Chinese company).