I am avid game player and I played game like "Game of war", clash of clan and so on. There are other game also that I am playing in steem blockchain like "nextcolony". But steemmonster is worth time spending.
1.You can earn DEC while playing regularly that can be easily converted to steem.
2.You can get rewards card that can easily sold for steem.
3. If you are good then you can earn from tournaments also.(but currently they are time consuming.)
I am not saying to play game for earning but I like that I get required earnings for game itself to upgrade my cards after one time initial investment of $10.
I pretty much sold out though.
Keep your cards, once "guild" feature roll out, there will be one more price pump and other price pump will happen when beta booster will be sold out.
In a couple of month my $40 cards are now crossed $250 (playing + reinvesting) and I expect them to around $1000 at end of the year.
For me it is really nice fun time.