strategy you say? you are simply exploiting a loophole ! imagine if invent 1,2,3 were filled with L Cards from random card(opened) boxes it's 190+ Card ahead of others !! for example, we collect 30 boxes a day, meaning you have stolen start for 6 days !! that means you are 6 days faster than players who collect it normally and not cheating !!
the previous event is also likely to be exploited like this! It's better if an event like this is made for 1 round only, but double the prize! I mean the number of winners! or the choice of prizes
why are you so proud to take advantage of a loophole like this? imagine how the feelings of the players who really took part in this event honestly? if you do this it means you have stolen the start for 6 days !! or you are ahead for 6 days than other players !