Cloud computing platforms often default to one CPU. Does this mean I shouldn't use Parallel Programming?

Question

Almost every cloud instance I can find defaults one CPU. Why is this only one CPU now, and should I expect this to increase in the future?

Does this design impact my code design so that I exclude technologies like Task Parallel Library?

This is on topic to Programmers.SE because it impacts the long-term scalability of muti-threaded code on cloud platforms.