i will get back my btc or no?
Haha, I assume you mean your initial investment. NO, you will not get back your BTC.
Personally 1MH/s is not very profitable although the higher amounts seem to be, naturally because the costs per MH/s decrease, but who knows what will happen with Dash and Startcoin in the future, perhaps they will rise in value and if they do that increases the BTC payout as the BTC payout is based on mining X11 coins and trading them to BTC. Of course payouts can go the other way too and payouts can decrease and unless some huge ass X11 Asics come along in the future and drive up the difficulty then I am hoping payouts will be stable...But this is crypto so who knows.
I noticed that on the X11 mining interface they have added LTC (AUTO) Doge (AUTO) and BTCD (AUTO) as well.