How to win more giveaways?

make giveaways yourself. be nice and get invited into private giveaway groups

With luck.

make gibefacts and win moar!

clicky 1

clicky 2

Raise your LCK stat.

cheat obviously :>

insert brain into head

You've won 2 games with your estimated wins only at 1.15, you're luckier then most.

How about entering more giveaways? you have entered less than 1000 giveaways since you joined, even at that, you have almost 2x the wins as estimated so you are luckier than most.