This is bad, given that advertisers end up corrupting every ad-supported media. Look at what newspapers, TV and radio became - thinly veiled puppets of the advertisers, willing to kill stories at their behest.

Users dont understand the externalised cost of free services.

Worse than that, they feel entitled to them, to the point that the actual expectation of having to pay for something that requires effort to maintain is treated as an insult.