Quote tweeting this tweet from Lawson:

5日間限定の無料券チャレンジ(^^)
今日は冷凍焼餃子無料の最終日です♪

1）このアカウントをフォロー
2）この投稿をリポスト
3）抽選で毎日1万名様に無料券！結果は自動でお知らせ

TL:
The 5-Day Limited Get-One-Free Coupon Challenge(^^)
Today is the last day to win free frozen gyoza. ♪

1. Follow this account
2. Repost this post
3. Up to 10,000 customers per day have a chance to win a coupon from the raffle! The results will be announced automatically.

And they received this reply from the Lawson account:

ご応募ありがとうございます！
はずれです
今後のキャンペーンもお楽しみに♪

TL:
Thank you for participating!
You didn't win.
Stay tuned for the next campaign ♪