Well ok then, i guess technically you're right, i was not counting the fact that some people may want to actually take that risky and probably stupid bet to reroll over and over until they get them... Just the recipe costs 900 diamonds when it shows up, so thats not so bad, but like i said, not knowing the odds of rerolls doesnt make that attractive to me at all.
And besides, I dont understand this way of thinking from the devs, its like they're counting on mass stupidity to make money. So what if we ALL get the 9 damn artifacts? you cant really abuse those things because you can only get as many as 9x the amount of buildings you have that are completely unevolved, in other words, ONE, since anyone who has 2 buildings of any type automatically has a fully evolved one and an incomplete second (or 3rd or 4th or whatever)
The abuse will come at event time, not at artifact chasing to finally complete the building. And since chasing is involved, why not just sell them. I bet you that most people have not even thought about the reroll option, but put the purple thingies in a real money shop, they'll buy them 100% guaranteed. In other words, a LOT of people would pay money NOT to play the Spire LOL