You sound like someone who is just salty over various things. Probably 1) You were one of the people who bought something and then saw it come out at 70% of the original price a week later. 2) You probably are a low end spender who feels like he should be #1 just because he keeps up with China.

There is absolutely no drawback to telling the community what you have planned and what they can expect to see. Whether a ninja is $1000 now or $600 a month or two later won't matter to the top 5%. Perhaps a few people considering it at the start who aren't super spenders may wait but that means a minimal loss. Those at the top buy it regardless, those who don't spend or can't afford it just avoid it entirely until it is much lower. However, those who are on the fence will look and see "Hey, if I just don't buy it now I can wait and get X+Y+Z for the $1000 when it comes back next rotation instead!" or "I can save $400+ dollars since I got a few frags already and waited." In this way they are still able to gain some money from the ninja but keep losses low because players are informed. If they don't tell people then the result is often different.

Most people who are able to pay for in game stuff set a budget, you know typical adult stuff. With the way the game is now you can either take this budget and spend, say, $20 a week or you can blindly save up and hope for a decent event to your liking. However, if we are told of that months events then more people will be likely to spend, even those who never have before, because they can budget better. A lot of people don't spend because they don't like going in blind with the "luck" based systems in the game. If they at least have a little knowledge they won't feel completely cheated out of their 5-10 bucks if things don't go absolute best case scenario.

Plus this would go beyond the realm of just events. Informing us of future content, updates and fixes before they are happening or an issue is a standard among all games. We deserve a right to know what our time and money is going towards and should have a say in what is more important. One of the biggest issues with the player-company relationship so far has been this closed door of severe secrecy they have. Yes it is nice to have some surprises along the way but to be left completely in the dark until just a day or two before a major change is a terrible business model.