Brokers demo account

Hi!

I’ve seen several brokers offer demo accounts, explaining you could train for free on the real market. But how reliable and genuine are these demo accounts?

Let’s take a given broker, were they offer demo accounts. Could it be that they are using their own “false” market just to give us “false” profit, just to trick us into opening an real account?

The reason for this question is that I have been trading, and betting, very successfully on the demo account at betonmarkets, but I’m wondering if this is just to fool me into deposit large money.

Thanks in advance!