Hi friend. I'm sorry to hear you must spend your Blurt on a phone, but at least you will have what you need. I suppose money (like cryptocurrency) is meant to be spent! That is what it is for.
"How do you make money without publishing or curating content?"
I think you are referring to interest? Every amount on Blurt is always increasing. Balances on accounts are the most obvious example, and the easiest to see. For example, if you refresh my wallet over and over, you will see the total amount increasing each time. I get about 60 more BP every day, this way. Other amounts are increasing at the same rate, too. Like the amount of payout a post or comment will get. Even without more votes, the amount is slowly increasing all the time. Amounts delegated to other users also increases through interest. The rate of inflation is about 2% per year. So even if I don't post, comment, or curate, my 1,000,000 BP will be about 1,020,000 BP at the start of 2025. Of course, inflation isn't always a good thing... as people from South American often known from experience! It causes a reduction in value of the currency, which means a loss of purchasing power. So there are pros and cons to the inflation on Blurt.
In turn, turning off my power has been counterproductive. I've seen my healing rewards go down. Although, I'm confident I can get it back.
It's always a good idea to keep a lot of Blurt power and then sell a little bit of your total amount. The algorithmic interest is low, but as you vote, the benefits accelerate with around 8-12 votes a day at 100% or around 24 at 50%. Also, using your blurt and delegating out can help when you're offline.