When veteran players begin to yearn for the "golden days" of a particular track, it often signals they've reached a point where they can no longer compete. New gameplay hasn't established an advantage yet, and they can only reminisce about the days of easy money. This is actually a good indicator: When everyone in a track knows how to make money, only a very small number of people can actually make money. Without incremental growth, they can only compete with each other. The smaller the circle, the tighter the grouping, and ultimately, all that remains is internal friction. Whitelists are a prime example: from "guaranteed profits" to "occasional profits," to "whitelist cuts," until—the whitelist effect is completely eliminated.