As far as I'm aware they only sell keys valid for a month. So you can't hurt yourself really (there's no lifetime anymore available).
Worst case you bought a month and they get shut down.
If not just use and profit.
Edit: I can see they returned to the old system.
Well, if you're afraid then don't buy a lifetime key.
Other than that use it and make the most out of it.
I have no idea for what reason you get the bot (private or profitwise).
I use it for private botting, and I'm quite content with it.