When a monopoly is faced with a smaller, more efficient competitor, they cut prices to keep people from switching, or buy the new competitor, make themselves more efficient, and increase profits.
When Steam was faced with smaller competition that charged lower prices, they did - nothing. They're not the leader because of a trick, or clever marketing, but because they give both publishers and gamers a huge stack of things they want.
The text on a Twix wrapper runs in the same direction as the Twix inside, so it's better to say they're top and bottom Twix - otherwise it's ambiguous based on the direction of the packaging.
Also, for double blind experimentation, she shouldn't know whether it's a left or a right.