"Can I upgrade startMiner with money on my balance?
startMiner currently does not support upgrading from internal startMiner wallet yet. You can only upgrade using external wallets."
That means that any way you'll have to chip in money..,.that sounds like screaming SCAM. And there is no way to find out how this stuff works.
It seems like being led on, doesn't it.
I've always taken the fact that I have 'no skin in the game' (no USD or other invested) pretty seriously. On the one hand, I have nothing to lose. On the other, I don't expect to have my concerns taken as seriously as those of someone who lost real money.
In my optimism, I hoped that these sites, which tend to be new, were interested in the free advertising and chat that free accounts generated. Thus they would make small payouts in order to look good and get positive buzz. If the owners of the site were actually mining, their payouts would be far less than their profits in any case, scam or not.
Even Ponzi schemes, which were mentioned earlier, used that method. They baited people with surprising returns until their victims had been lured sufficiently. That probably would have worked on me. If I saw real returns once I'd be 100% more inclined to make an investment.
I was surprised that I never even got any spam from having my address sold. After all this chat about these sites, it seems like they are scams with crappy business models. We have not heard from a single person that actually was paid by any of the 'free' sites so far.
what can they do if they just take your bitcoin address? I've already 0.00000480 BTC but don't know what to do
All the sites I've seen pay out starting at .005. I know that Coinbase's addresses change with every transaction and my research tells me that is the norm. I don't know about the paper wallets mentioned earlier in the thread. I haven't looked into them yet, nor have I 'played' with my Blockchain wallet.