Please read their reasoning behind it. You must have not as the reason is due to a lack of funding. The bot was officially dead for almost a week before it was returned with a new payment plan. If you like the bot then this is the next best thing to not having one in the first place. On top of that it's now better than ever with very active development that we've never seen before.
I do not think either side is wrong with their arguments. The problem is the buddy team was competing in a smaller market, to which the amount of downtime surely had them losing customers to another bot, and not gaining as they should have because of the public facing appearance of the bot. What should have been done, is more resources allocated to the bot, the bot should have been made to the standards of all the other bots they have. This would have had a better start and drawn more people in, rather than steered them away. There had to have been discussions of leaving it to one core developer being tricky, and that it would run into issues. It is sad that its the community that supported it thus far, that ultimately pays for the poor decisions of the team. This is not my first sour taste with this team, Rift almost made me stop supporting these products in a whole, and now again I will be revisiting the idea of using alternatives. I can only hope in the future they have there shit together, as adding one more developer I do not see being the change this bot needed. Even if it cuts the work load in less than half, the downtime for the beginning of leagues, was beyond acceptable to warrant this kind of action, and would still prove far to much downtime in the future. I will keep an eye out for the next upcoming temp league and see how it does, but I can't bring myself to support a company that doesn't honor there marketing. I have spent hundreds of dollars on keys for multiple games all which collect dust now, as well as projects they have ended.
What should have been done is a window period offering people with lifetime keys, to upgrade them to "Exiled Buddy Plus Lifetime keys" something of this manner, raised the price to have met the 3 month gap and allowed those people to have kept what they originally purchased if they so chose to do so, or out right refunded keys. They are on a slippery slope, because now I do not trust any of there projects that say lifetime.
They also could have left the CORE bot alone for lifetimers, and added pay for add-ons, each being subtle amounts or a life time add-on etc, there was more options that the road they took, that would have left people a bit more satisfied and trusting of there actions.
Either way, I will probably support them in the future, if not for one reason. They are fighting the industry (Blizzard) on the right to exist. I do not play any games Blizzard made no more, but I respect their defense on this. I just find that selling one thing and not honouring it is a poor precedent to set forth for the public.
Edit:
As to also the defence of lifetime key purchasers, that money funded the bot. We are basically told, thanks for supporting development thus far, but your not allowed to use it no more. The game is a free to play game, and the bot monthly usage cost more than AAA title monthly subs. This is kind of ludicrous to the people who are not in the market to make $$, they will lose money pushing casual botters to the competition, that's plain and simple. These people such as myself have been around supporting them from when this was just Honor buddy, and have purchased products for other games along the process.