None of those are computer science, no. It’s hard to say what computer science is because it is a bit of a historical mish-mash, but blogging, e-commerce, and affiliate marketing are not anywhere in this field.

Game programming intersects with CS, however.

Computer Science is, depending on who you ask, programming (think software engineers), computer hardware, architecture and networks (think I.T., network people, or the folks who design the next processor Intel is going to put out), or theory associated with computation (think mathematicians).

As you can see, marketing, which is its own completely separate field, is nowhere near any of those categories.