@Nibar, we've had this debate before.
First, I think your exaggerating with "over fifty percent" of the games having broken links, but certainly if they're a developer that is still going such as draconis, feel free to report them, since if we don't wknow we can't fix them (I fixed links in Sarah's entry just recently for example), and sometimes links can change just because a developer has updated their site, or because someone who previously hosted games has changed their mind (bladestorm360 for example hosted several games onhis site for quite some time which are now not available). This is also why it helps when people who are hosting abandonware games actually host them perminantly and provide links rather than just going "here's the game on dropbox" and just passing it to their friends.
This is also why we add links to the game's webpages, since often the developer's own site will host the files even if the direct download link on audiogames.net isn't working, I recall this happening with several of draconis games at one time, their own site was fine, but the individual setup files to their games had moved.
Secondly, in some cases like Bsc, Code factory and bavisoft, yes we do keep the games around for historical purposes, and because on occasion games have been released as abandonware later on, that happened with DanZ's games, actually I would love to see Bsc's titles released as abandonware so everyone can enjoy them at some point and part of the reason I keep the pages up with the arning is in hopes the developer will do that in the future.
In other cases games may simply be temporarily unavailable, but might be available later due to site hosting issues on the part of the developer, for instance Superliam was not working for quite some time, but now it is.
Lastly however, I will point out it's quite legitimate for us to say "555 games in the database"
This is an informational site. we do not make or maintain the games, we are not responsable for hosting them, and what developer's do isn't under our control, we can just write about what we find, and if something changes, well that's not exactly our fault, ---- we'll do our best to fix things of course (especially if people let us know what the problem is), but ultimately we're only human.
With our dreaming and singing, Ceaseless and sorrowless we! The glory about us clinging Of the glorious futures we see,
Our souls with high music ringing; O men! It must ever be
That we dwell in our dreaming and singing, A little apart from ye. (Arthur O'Shaughnessy 1873.)