I composed for myself, but mostly for my duo/trio/quartet at their time (most lasted like 5 years) because we were feeling short of original repertoire.
I send the score and/or recordings to my friends and acquaintances.
I am very pleased if someone I don't know wants to play my music and I simply send it. I don't intend to earn money with my compositions. The little I got up to now was enough to buy French fries like twice a year...
, which means about 50 portions in 25 years. Don't worry, I didn't buy that much!
There might be a publishing project in the future though, at least for one quartet as it won Mrs Antigoni Goni's Volterra Project composer award.