I’m fairly new and don’t 100% understand it yet, but instances are run on servers that require money. Are we heading towards seeing ads or subscriptions to raise funds instead of relying on donations to cover overhead?
Especially with the influx of new users. Hardware upgrades are needed.
This is true but if you were to do that most people would simply not receive your emails. The fight against spam has effectively turned email into an oligopoly.
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I was replying to the part where you said that “You can spin up your own email server tomorrow and start communicating with the world through the email protocol standards”. While I agree that this is technically possible, it has become increasingly difficult (see this blog post for example).