Did I lose these 76 shares?
No.
22.74 Mh/s worth it for Ethereum mining? (I live in Belgium)
Depends on how much you pay for electricity.
How much is 1 share of ethereum worth?
Depends on the difficulty you're mining at.
Also this is the Bitcoin mining subforum, not really anything to do with Ethereum.
Actually it's altcoins, so ethereum is still considered an altcoin, so he posted in the right place. Although he posted under pools it probably would have been better posted under mining.