Quoted from mrm_4:

I think they’d be more realistic
It’s pretty lame that every single new game is the best game ever.
Today’s example: “I wonder how good mando is?” (Checks rating)
“WOW it’s got 10’s across the board!!!”
Proposed example: “I wonder how good mando is?” (Checks rating)
Pinside message: “Sorry, this game is too new for a fair rating. Check back in ## months”

Quoted from megadeth2600:

I really don't follow the ratings. However, if the goal is to keep the newer stuff out of the Top 100 until the ratings become a bit more realistic, just make a category for the releases of the past year. After a game has been out in the wild for a year, it could then be moved into the Top 100. If people are obsessed with screwing with the ratings thinking that it boosts their value, they'd have less motivation to do so since they'd only impact a much smaller list of pins.
I find it sad people would do this kind of nonsense just to boost the value of a game. Experienced collectors know better, but anyone new to the habit could get played by the deadbeats that do these kinds of things just to sell a pin.