The way I look at it is like this.
Yes they are asset flips or just the actual example project but just because they have ratings does not mean they might win or take away from others. Hear me out.
If example game had high rating count but other games that Dev made from scratch only has a low amount. This example game might receive only 1 star across the board and the other game might have higher star scores. This would mean that yes the non example game had fewer rarting but gets an overall higher score.
Yes the game someone worked hard on got less plays but at least they know that they didn't just use an example project. They should be proud of that.
Example projects should not of been allowed or at least have a separate rating system or Jam. Maybe a Jam aimed at newer Devs or people that are new to gdevelop.
(This is all just my opinion.)