[>BKA< T Wrecks]

Sounds good to me! A trial period would also give forum members some time to d/l the bot in question and test it a bit... yes, that's a good idea!

A kind of "reaction" check (game updated = bot updated) is a nice idea as well, but
a) I don't know if some older or less wide-spread games / mods will see many updates (take RTCW as an example, or imagine Ricochet), so that this check might not even apply for them
b) In some cases, the bot isn't even released yet - think of PMB's RACC project. You can't expect him to react to CS or Steam updates with a new release as long as he doesn't have the basic programming for his bot done.

IMHO, the logical consequence to these two points is that the requirement to follow game updates would only apply to released bots, and only affect bots for games / mods that are still more or less regularly updated.
Some bots will simply fall out of this pattern - the question is if this is a catastrophe... I don't think so personally.

Anyway, the "2 months start trial" sounds good. How about a general absence check? Not announced absence from the forums for more than 1 month = warning(s) and eventually ??? yes, what? Ban? Automatic move of the forum to the "discontinued / 'idle' bots" section?