It's not the 10$ a month for Spotify: 10$ to Spotify, 10 to Netflix, another 10 to Disney+, to Now TV/SKY (in my country), to DAZN, to Prime Video, etc. If you sum all the services you have to pay you spend easily more than 100$ a month in streaming services, that is 1200$ a year that is for most person in my country a month of work! And the others would rather spend if for other things, such as a vacation.
Finally pirating is most of the time more convenient, for example using these proprietary services on Linux or Raspberry Pi etc is not possibile, also they require internet and you can't just for example save the files on an USB stick or CD to play on the car stereo.