>>9274228>How often does mega anon update it?Not Mega anon, but every few days it seems.
>Is it possible a watamelon has been missed?There's over 1500 melons in there, so it's possible one has been missed.
>Lost to the archive forever?Wakarimasen archives /vt/ and it's got everything from when the board was first made. As long as it doesn't die, no Watamelons should be lost to time. However, as 4chan archives often die, I recommend preserving Watamelons when possible in case it or the Mega dies.