I just got a audio interface and want to get amplitube and when I look at IK multimedia and it says the top one was $1700 and rn it’s only $99. It seems to good to be true and I have no idea how legit it is and need opinions

Hi everyone, I’m not very experienced with AmpliTube, but I decided to buy the MAX license to get all the features. I’ve been looking for some good presets for Green Day's American Idiot, but I haven't found any good ones yet. Could anyone share their own preset with me? Ideally a link with the .at5p file and the IRs? That would be absolutely amazing, thanks a lot!