I started losing more often than a few days ago

I need to be more careful on my chosen tactics from now on.

I got used to winning easier.

Not sure why, but for two days or so I started losing more often than before.

I believe there are now more human players involved, trying to up their accounts for better rewards.

I still haven't found a good mix of reward cards and beta cards for my decks.

Sometimes I wonder if the inflation of different available reward cards doesn't diminish the value of beta and alpha cards. Not that I don't like the reward cards because I do, I could never compete with others money-wise, but if you can form a deck with mostly reward cards (splinter + neutral), are alpha and beta cards still as important as before?