You can play as long as the program continues to be supported and on multiple platforms. It is basically a perpetual license. You won't have to buy anything twice as long as you are logging in with the same account you used to make the original purchase. Make sure to keep records of your purchases in case you forget your login info.
Just played in a game where I was in last place and bot proposed a trade of 1 brick for 1 sheep. I accepted. It rejected me and then gave the guy leading by 4 pts a 2 brick for 1 sheep trade. Of course, I’m ranked the highest in the game so the not discriminates to give lower ranked players the advantage. This happened 2-3 times with this bot until the other guy won. Then his ELO slingshots by 15 and mine goes down 8. What kind of BS algorithms are y’all creating?!