This is an extremely common annoyance of mine with Kickstarter campaigns. I back a lot of projects, and it's insane how many creators abuse the "project updates" system to promote other projects, often totally unrelated and from totally different creators. They're clearly getting paid for these promotions. I can't just "unsubscribe" from the updates because I do need to be aware of "real" updates that may require my input/action.
And many apps that rely on push-notifications for their core functionality are polluting these streams with ads. Uber basically admits this: they send ride updates by sms because they know people turn off their ad-filled push notifications.
My town is also using its covid-emergency-updates sms system to advertise local composting.
This is becoming an acceptable practice, and it seems impossible to filter the cruft.
