Yes, but that owes heavily to growth in pre-internet industries in developing nations. Unless the Internet is a crucial enabler of that growth (possible, but not a given!) the more relevant question concerns growth in the developed world, which has been lower.
You're trying to find growth that is directly attributable to the internet, which is fairly futile in my view because the internet is not in itself a means of production.
Not at all. If the Internet changes the way that other goods are produced, that is an impact of the Internet (so I do think the Internet can claim some influence on the growth of international trade, just not an overwhelming percentage).
My company does SaaS for logistics. We lower the cost of moving goods for our customers. I count that as economic impact. It's just that the impact is relatively limited. We can get you lower labor costs, faster planning, more optimal routing, and higher utilization, but we can't make a truck move twice as far in the same amount of time.