How did i get shopping voucher from a ticketing startup

Around 2 months ago, i was involved in a discussion in a telegram forum Blogger Indonesia. One of the member posted about a blogging contest from a ticketing startup company. The rule is simple, you only need to choose one category of their services, and try to review it in your personal blog.

So i started to try one of their service, and manually captured the process on their website. Then i give my personal testimony how i feel happy and get benefit using their service. I published the review in this link.

http://www.mmomon.xyz/2017/10/traveloka-pulsa-paket-internet.html

I submitted my work to the google docs form which they provided. And today i got the above email, and i used it to top up my personal mobile phone number.