Yes, it was. Several times iirc from what I could tell but I wasn't online for the bulk of the attacks so I'm just going off of screenshots and stuff I've seen. Kinda strange that they didn't have anything in place prior to the attacks but I guess its taught them a lesson on how to properly protect their website
Because usually people don't need a specific motive to DDoS anything, sometimes groups will just do it simply because they can. We're likely never going to know what the intention of the attack was unless the individual or group behind it is named.