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Ad-free Facebook, Instagram access planned for $14 per month in Europe
(arstechnica.com)
This is a most excellent place for technology news and articles.
Isn't this exactly what Netflix is trying to do with their paid subscribers?
Netflix didn't start with ads, and the ads don't affect pre-existing subscription tiers.
... other than the fact that they cost more to 'make room for' the ad-supported service at and near the former price points.
Did some more research and Netflix did remove their "Basic" plan when they added the cheaper ad-supported tier. They also raised the prices of their other plans, but those increases were consistent historically, so I'm not convinced the addition of an ad-supported tier caused them.
For what it's worth, Facebook didn't have ads way back in the day