If the games were welcome to chess.com games, instead of rated, actual games, then they disappear after a few hours/days.
Where is my archive?

Actually, I just looked at your profile, and they were actual games. I have no idea what happened to them, but I'd ask a staff member.

Games Archive
Chess.com stores all of your games (Online Turn-based and Live) so you can download or access them at any time.
Premium Members have access to ALL games ever played on Chess.com. Basic members have access to all games played within the last 30 days. Keep in my mind, we never delete games, so once you subscribe, you will have access to all your old games once again!
Click here to upgrade your account =>

Thanks Erik. I am planning to subscribe anyway (very soon) and you have my support, but I don't think it's fair to use this tactic to get people to subscribe without at least warning them first. After all, I had access to all my games until very recently and if there was a notice, I must have missed it, which is strange because I go on chess.com every day. I would like to know when did you guys decide to implement this restriction and if there were any warnings.
Has anybody experienced the same problem? Suddenly there is only one game I can access, both under "recent" games and under the archives (I have played probably something like 8 games already). Am I missing something?