It'd be nice if we could make suggestions and improve the game without making such baseless claims about the devs. Some mistakes were made for sure, but I think you missed the part where Michael (the creator of this game) paid for the game to continue existing for years out of his own pocket.... They (we now, I guess) always cared.
As others already pointed out, the game isn't so simple. While I agree boosting is an advantage, it's mostly due psychology (in truth, anyone who thinks units win wars probably needs to fight a few more wars Attitudes do. Morale does.)
We've already tried before to get a buy-in era going, interest wasn't great enough, and having an era that small isn't much fun either.
Since it seems you're quite frustrated with how often boosters win (I get it We are too. Not because we dont like boosters, they support this game so everyone can play it, they're the MVP along with the people who share this game and the mentors and all the other people who make BD great... But because the game is more fun when its hard to guess who will win, and some people seem to feel like helping the #1 win is a good idea ) -- How about some suggestions on how we could make this game more interesting? How we can empower not the non-boosters or anything like that, but basically everyone who isn't winning so we see a few more upsets in eras?
How can we convince people to gang up together?
I've some ideas of course, some planned already, some just things to think about, but I would absolutely love to hear even better ones!
Edit: As for play once per download, this game thrives on the community. The idea of not having all these amazing people who come from countries where a game isn't so cheap and affordable, all these people who found us through the web, is terrifying for me. Maybe we'd do better, maybe not, but I wouldn't give the community we have now for any other.