which is the next Price: 0.0022 BTC ??
THE CURRENT PRICE NO LONGER WITH COMPETITIVE CEX
Every time price went down, minimum buy always rise. those who have small amount BTC will sad (like me)

only have 11 GH/s
But, i think price is competitive, because PBMining don't cost any fee. while cex.io still had some fee

From what I understand, merged mining is still mining bitcoin. But since some coins are based on bitcoin code, you can use the same hashing power to mine those coins, like for example namecoin. Of course, those coins should support merged mining for you to be able to do this. For example, for a single hashing power, you mine bitcoin and namecoin, without losing or dividing hashing power. Some bitcoin pools already support merged mining. I think this is what lunamine is saying in their ad.
I just don't know if current merged mining setups bring in considerable additional income.
I think merged mining will have extra profit
maybe someone that know more can help us

I don't get this cloud mining

So let's say I buy 1TH/s, that's worth
BTC2.9 then I mine for 30 days. Then after that, I don't want to mine anymore.
Do I get my
BTC2.9 back plus my earnings from mining??
That's not going to happen
because it's
CONTRACT and cannot canceled
I think you need read carefully Terms of Service / the contract