IOTA is not stable, really.. I mean I have been tested it for several days and there is always some problems with transaction confirmation (you have to promote the transaction each time to reach the confirmed status in the tangle). Also there is a problem with a good neighbors...
So once I'm sure, that IOTA wallet can process all withdrawals without delays, it will be added here.
And I remember when Primecoin was in the first list to be added on Lucky, but something stopped me
(low volume, low support). The last realease of Primecoin wallet was on 9 Dec 2013. Everyone has forgotten about this coin and for a long time it stayed near TOP 300-500 coins.
Within a few days we can see a huge pump of Primecoin without any background. So maybe, it won't be added.