"It's buildable"What it means:
It's not very rich or pigmented and you need a lot of it to actually cover imperfections.
"After the demonstration, you can purchase a product"What it means:
You are not getting any products free after your makeover. We are not the MAC counter.
"Just... keep blending till it matches your face"What it means:
That product does not match your face. Do not buy it.
"Take a sample and try it for yourself"What it means:
The product sells itself. (This is a good sign.)