i blame slow meta that happened rougly 3months-half year after launch each game lasted 30mins - 3hours playerbase dropped to 500's during it and mojang did not rly do anything to make it any faster for several months (i also quited game during slow phase and only logged in once in a while to check major expansions) another thing that affected dead was the fact you could not buy cards with real money so any player without time to grind for packs was in disadvandage compared to active players