coin have dump by all exchanges, btc38 include. if we compare sigt and xcn, I go mine sigt ($25 from sigt vs $15 from xcn). so, where is "very profitable"? I realy don`t understand, sometimes I read post`s from some coins about very profitable solo mining, I go to try, but no blocks. why peoples say about it? only new coin can have big profit from solo mine, but only few time. xcn is old coin, big net hr, big diff. where is big profit from solo?
solo mining profitability doesn't depend on how many cards you have.
I was talking about profitability = profit / hashrate, of course.
In solo mining, more cards = more chance to find a block, but profitability will stay the same, as with pool mining.