Yes, it appears to be the case based on the financial reports that they released. It seems that due to the large number of doses they sold over the quarter/year (208M/510M), they were able to make a large amount of revenue from it. According to Moderna Reports Third Quarter Fiscal Year 2021 Financial Results And Provides Business Updates:
revenue: Total ...
The question doesn't seem quite right: Farmers do better yes, but it's farmworkers that the quote is about.
Here is the relevant Fair Trade, Employment and Poverty Reduction (FTEPR) project reports:
Fairtrade, Employment and
Poverty Reduction in Ethiopia
In a straight comparison between workers at Fairtrade Certified ...
The story is well-cited by Wikipedia, and it appears to be true.
Wikipedia cites The Huffington Post, which in turn cites Robert Frock's book:
“I asked Fred [Smith] where the funds had come from, and he responded, ‘The meeting with the General Dynamics board was a bust and I knew we needed money for Monday, so I took a plane to Las Vegas and won $27,000.’...
There's three parts to this question, which I'll address individually:
Can the administrator of a Bitcoin exchange arbitrarily change the exchange rate?
Certainly. The exchange software is just software, with all the potential for bugs, easter eggs, back doors, and so on that software is prone to. It would be trivial to add a "Set exchange rate" function ...