How many Altcoin Genesis-mining is supporting? Please anyone can give me a number?
BitCoin (auto)
DarkCoin (auto)
LiteCoin
DogeCoin
AuroraCoin
FeatherCoin
LotteryCoin
MegaCoin
ReddCoin
BlackCoin
There, all current coins. And you do NOT need to choose Megacoin (but you should). Auto means the most profitable coin is mined and exchanged for either Bitcoin or Darkcoin.
So that's a great example of Genesis not staying current. ReddCoin is no longer mine-able having moved to its Proof of Stake phase. AuroraCoin seems to have flopped as has LottoCoin. So really the effective choice/value comes down to Lite/Doge/Feather/Black/Mega, with payout in Bit/Dark. Personally I would like a larger effective choice than five.
And on the sysadmin work front, the real complexity jump is going from one to multiple, unless there are horrendous manual processes hidden behind the scenes. Certainly the variability of daily payout time and prior comments here about a manual sign-off process would suggest that the current Genesis infrastructure may not be operationally scalable in the multi-coin dimension in quite that same way that Bittrex seems to be. And in saying that I'm not trivializing the difference between exchange and mining operations, but I hope you take my point to some degree. Some of the issues in supporting multiple coins are common to both.
The Reddcoin option now works by mining the other coins and then getting a payout in RDD coin each day, which saves you having to go to an exchange with your BTC payout or other coin, and then having to exchange it to RDD yourself.
So yes, you are correct that you can not mine it, but some people still like to acquire them and this is the most simple way to do this.
One of the good things about Genesis Mining is that it is simple to use, some people just want to be able to pay for hashpower and get coins each day and not have to worry about all the other stuff.