My 5 sats:

- What is the value proposition? What does a user win from an opensource sw, if they dont run it themselves? Who is the target audiance.

- Normal users: They are fine I think with the generally available solutions. So for them, something that is run dedicated for them may only be appealing if this is a feature they dont get elsewhere.

- Companies: They are anyway paying some stuff, or hosting their own solutions, so you could maybe lift some weight over their shoulders. Or help them start on a new service.

- Privacy minded people who are lazy to host things: They could benefit from this, but then you need privacy guarantees.