In 2023 Bitcoin developers were offered a sum total of $8.3million... I never had in mind that Bitcoin core developers have sponsors, usually I'd assume they've garnered more bitcoins, as early birds, and decided to voluntarily build and maintain the network. In this Magazine by DanO'prey And Mas Nakchi they claim to have done some research regarding the companies and individuals that offer grants and employment to Bitcoin core developers. The list include;

• Open sats
  
• Btrust
• brink
• Spiral
• Digital Currency Initiative

Besides the above listed projects, a lot more organisations like bitpay, xapo, bitmex etc, have funded Bitcoin and lightening development, but these platforms weren't consistent and most of their developer grants are inactive.

In the last pages of the magazine a chart is there that shows individuals like Jack Dorsey and Jay Z as individuals who have also contributed to Bitcoin core developers through the medium of the above listed companies like Btrust where the both funded 500 btc to run Btrust.

While it's the first work I'm reading on this topic, I'd want to ask, why so much interest is focused on miner's earnings compared to the core developers?