Maybe its just me, but $950M seems a lot of money to invest in a "company".
Had to check my assumptions though so I looked up what the lower end of GDP for a country is and sure enough they have American Samoa, Dominica, and Tonga beat. Now that money is probably meant to last 16 months so its not quite apples to apples but kind of wild regardless.
Ref: https://en.wikipedia.org/wiki/List_of_countries_by_GDP_(nomi...
In economics, comparing a corporate investment round to a country's GDP is considered flawed. As you noted with your "16 months", the company is sitting on a $950M bank account that it will slowly burn through over the years. Comparing a multi-year pile of cash to a single year of national production distorts the scale.
You are basically comparing a nation's actual hard work and output to a speculative pile of cash. Even comparing corporate revenue to GDP is frowned upon by economists. A company's revenue includes the cost of all the inputs it bought from other companies (such as servers, electricity, and software licenses). GDP, by definition, strips out intermediate costs to avoid double-counting and measures only final value added.
You're also picking nations that do not produce much or have a very low population (Tonga only has 100k people), which pulls down the GDP due to how it's calculated.