For many years, Cubs fans were blacked out from watching games on their phones, tablets or laptops if they were inside the team’s market territory, even if they had a cable or satellite subscription. So were fans of almost all other teams.
This was remedied within the last few years, as MLB and its RSN partners signed deals to allow in-market streaming if you authenticated through a cable or satellite provider. This was quite useful to such a subscriber if you weren’t at home but wanted to log in and watch a Cubs game on your phone.