> you are the customer, not the product and recipient of subsidies
They also do advertisement (promoted tracks and audio ads) but this is irrelevant to my point, what I described applies regardless, including the fact that heavy users of the unlimited plan and free users definitely receive subsidies, both from light users and from ad revenue of the platform.
> You pay, you get service. You don't pay, you don't get service
The definition of the service you receive and how good it is includes what happens when you decide to off-ramp from receiving it. Changing your service plan is your indication that you want to change service, what happens after that is how they handle it. There is no stipulation whatsoever that things stop being available to you immediately.
In fact, in case of SoundCloud, they themselves prove this, because they did not delete data but instead continued to keep data for free, which means providing you a service that you presumably stopped paying for. The silly move of them was to do that and not allow you to download it, and then emailing the victim urging them to pay to access this data, which makes it 100% a dark pattern and means they are effectively blackmailing customers with proven ability and willingness to pay.
If I remember right, Apple (an American company) handles it better and gives you a month to download excess data if you downgrade, but sure, “dark patterns”.
> There is no need for a grace period when you knowingly and voluntarily make the decision to terminate a file storage service.
If you terminate your use of a file storage service, you would expect your personal data to be deleted. However, no one terminated their use of a service, somebody apparently downgraded their payment plan (temporarily or not).