Speaking seriously:
Let me correct some of the contextual errors in the Ad:
1. It's not free. Maybe if this was an ad for a Non-builder's club version of Roblox, it would be.
2. Less then 1% of builds people make on roblox actually look as nice as that.
3. The physics effects in the video will crash almost every low end computer that the average 8 year old is using.
4. The particle effects in the video were created after the video was shot. Nice false advertising.
5. Almost all of the item customizations the filmed players were using, can only be bought with builder's club. Which costs more then a WoW membership.