If we get anywhere near a situation where one miner have a lot of power (counting the new miners as one) i'll resume my TB upgrades and so will others too i guess.

I'll add 10TB this month, just to show some commitment. I have 85.42 TB now.

If new miners sell their burst on the exchange as soon as they mine them, it is bad for burst price in the short run, but i guess in the long run it doesn't matter much, somebody has to buy them, and those buyers will get a sizeable rebate and make a good return.  When bitladen stopped selling, burst went up a lot in price. That rise did not go to bitladen, but to the people who kept their burst, and to people who bought burst off the exchanges when it was cheap.