LEGO Monthly Mini Model Store builds have been going for quite a few years and they have been quite popular. Best of all , they were free. However, they became VIP exclusives not too long ago. You also have to begin registering a month in advance before you can participate in the builds.
Unfortunately, March 5-6, 2019 will be the last free monthly mini model store build. Registration starts February 15, 2019. The entire LEGO Store Monthly Mini Model Build program is ending and there will be no more new models after this date.