As much as I like a good mystery, I think some of it is contributing more to the paranoia level than to the fun side of Trainz. Back in the day when we had puzzle pieces scattered all over the place and we tried to guess how the future of Trainz was supposed to unfold, the world was a slightly more innocent place and people were not as fast to ascribe dark motives to every action. Today every corporation is assumed to have a hidden agenda with the basest of motives. Not saying that some don't fit the bill but they are all suspect by association.
Sad really, that games have come to this, Trainz too. Now it seems everything is being interpreted in the worst possible light. Try to involve the community via something like KickStarter and something must be wrong with the finances or some equally as bad.
Trainz was always a fun place, wish we could return there.
As for the red circle, doubt it could be a count of the donation order, unless they use very small numbers or don't expect many donations. With the "name" already implying a donation level, or is that not true in which case it might be a donation level. (1, 2, 3 ... or A, B, C ...)