Coffee does not cost 1 us dollar. The poorest countries survive on $500.00 to 2000 us a year. $90.00 isn't even affordable to everyone in the west.

There are plenty of completely free editors that are within striking distance of IDEA editors, and some of us even prefer them. $90 is fine since it's not a requirement for 99.9% of the coding jobs out there. I wouldn't be too worried that it is $90

I'm really talking about home-made coffee (with some milk). Even in the cheapest countries, a cup of coffee (in a cafe) costs more than $1: https://www.entrepreneur.com/article/310492

People who are surviving on a $500-$2000/year budget, are not on the market for a full-fledged IDE.

This study is definitely flawed. It costs approx. 10-15 INR (0.2 USD) for a milk coffee, not 1.51 USD. Even at Starbucks, it would cost at most 1 USD.

first off, you're calling bulgaria, india etc. poor countries. relatively, okay, but op was about even poorer countries. But more to the point the prices you quoted were about buying coffee in restaurants. Most people drink their coffee at home (or at work) not in shops. And it's much cheaper then. E.g. I usually drink senseo and it costs me about 25 eurocents per cup.

You might be surprised but if coffee is imported, it might actually be cheaper in Europe than in these poor countries. Import duties, corruption, bad port infrastructure... all of these issues inflate costs.