Finally figured out how to make a miner purchase make financial sense

[DieJohnny]

I calculated difficulty increase as a negative 20%!! -20% OMG yes!

Doing so means I will pay back my miner in 3 months and potentially make 100 BTC by end of next year.

Yes!!!!

[armedmilitia]

Wow! I should go out and buy some block erupter USBs, they're a steal now!
That means that eventually they'll start making ∞ BTC per day, I wonder if that will have an effect on price? 

[throwingbones1]

I calculated difficulty increase as a negative 20%!! -20% OMG yes!

Doing so means I will pay back my miner in 3 months and potentially make 100 BTC by end of next year.

Yes!!!!

lol, you are a fool

[Rovernelson]

There is no way difficulty will decrease 20% unless a mega industrial mine is shut down like the mine in Thailand

[CoinBreader]

mining is profitable when you have free power & free equipment , or else ROI will drop down to the the drain!

[xstr8guy]

There is no way difficulty will decrease 20% unless a mega industrial mine is shut down like the mine in Thailand

That mine in Thailand was not anywhere near Mega status. I don't think the network difficulty even flinched when that mine burst into flames.