The costs to run relay node are $ 500-1000, and might be doubled or trippled if you want to run in HA mode…
The foundation has the community relay node program in which anybody can participate… I believe there might be done things to make it more decentralized but it is up to the foundation to dictate the rules on how they with to spend their budget…
I have expressed few ideas for improvements for example here: Algorand, The Foundation, and the complete lack of adoption - #11 by scholtz