A usual case for half of your friends to mention the app can already be achieved when there is around 100K - 500K Android Downloads. Two good examples are ZA Bank[4] & LIHKG[5], ZA Bank has only 100K+ Downloads on HK Play Store, yet I hear at least 30% of my network talking about it, 70% for LIHKG. This is why I kinda conclude that Mcdonald's Hong Kong has bought certain amount of downloads.
Adding on to this, when I'm checking the reviews on play store, I see that 80% of the 1-2 stars reviewers are local and more than 90% the 5 stars reviewers are non-local, concluding that they are buying 5 stars review.
It seems like Mcdonald's Hong Kong's company rather spends a lot of budget to (they also did lots of promotion like giving out Dispenser for orders more than HK$60), instead of spending the same budget/ part of the budget to improve the app.
Extra Read: [1]: https://play.google.com/store/apps/details?id=com.mcdonalds.... [1]: https://i.imgur.com/hfU3fNT.png [2]: https://www.statista.com/statistics/953589/hong-kong-apple-s... [3]: https://play.google.com/store/apps/details?id=com.zhongan.ib... [4]: https://play.google.com/store/apps/details?id=com.lihkg.app&...