Depends on which exchange. Exchanges with order books like coinbase, kraken, etc just get their bitcoin from customers, people buying and selling fill out the order book. Exchanges like River, Swan, Strike, etc are brokerages and get their bitcoin from market makers and other services. Lots of these services just have accounts on the other exchanges and buy at whichever has the best price. [...]
Every orange pill attempt should be tailor-made towards that person. It's best to not pick what you think is most important about Bitcoin. Pick what would make it most useful to them. [...]
Amboss is a badass tool for a node. If you add your Lightning Address in your Amboss node profile, you will see it listed in quick pay addresses in Thunderhub. [...]
Great advice from @timechain