The coin has blocks each minute and most of them get mined by this pool, so, i'm getting 0.158 clams aprox each day with 481 invested that means. a profit of 0.032% daily or 12% in one year.
If it so good why not many people are doing it?
Because clam gets banned from poloniex and that block the coin from the markets, but now we all have access to the coin again, so it's a good chance for all.
Or maybe they don't see that 12% something as profitable as compared to trading or hodling the cryptocurrencies. But to be honest if they factor in the compounding rate when they just re-invest on what they earn I think they'll be re-thinking about it again as yes .0032% daily might be low compared to the 1% being given by the HYIPs one but the power of compounding is still there, for people who are in the crypto industry and will like a steady and a non-volatile way to earn I think this will be a good option for them.