Is betonmarket a Scamer?

I'am a client of betonmarket.com to trade mini binary options.
I would say, it is not a scammer, but in my personal feeling I felt  like being stolen by a thief that uses evil tricks to take your money away. Why I felt so?
i.e:
I traded during 2-3 hours about 20 winning trades and only about 5 loosing, with amounts between 2-5$, having a bankroll of about 110$.
But does betonmarkets wants to steal your money away with evil tricks? They just put in the betting field for the amount again and again 100$ per default. So you can change it 100x, but one time, you just oversee it and you bet with 100x bigger amount than wished, and of course, exactly this time you'll not have enough luck, and away is it!
And should I belief that they do not exactly count on this, that over time I'll just will oversee the standard 100$ automatic put into the amount field, could-blooded, knowing, that statistically over the time almost evereybody ones oversees that the amount changed back to standard 100$?

Shame on you BETONMARKET.com for such an evil practise to take away the money of your clients!

I'm shure this is not the only broker with such evil behaviour. But I'll look for a better one that treats me fairly.
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Attention: according to a email from betonmarket in reaction to this article, they changed the tricky behaviour with the 100$ amount. See correspondence in the comments. Bravo.
 I will check, if it is true and write it here. If yes, there will be no more reason, not to recommend this broker!
26.9.2013: So far, i made some trades and the automatisme to put 100$ in the amount field seems to be changed a little bit. In the beginning it's still 100$, if I change to 2$ it mostly remains 2$, but not allways!  So it seems my action brought  something and made trading with betonmarket.com a better experience. I can recommend so far but will further write here if it's really better. 
This does not change I personally taken consequences of the bad experience before.

July 11 longtime Trade - Sell USD/CHF

Her I explain the reason:



Allways use not more than 1% of bankroll per Trade!
If you have € 1000.- your trade size is of 1% is 10$ .
With etoro you need to activate leverage of 100x for $10 trades if you have below 1000$ bankroll .
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For beginners specially I recommend to open an account with etoro.com
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