[int_19h]

I think it's fair for people to be surprised when their donations to the project are used for personal expenses when that is not clearly spelled out. There's nothing wrong with crowdfunding what is effectively a salary for a F/OSS project, but it needs to be explicit when soliciting donations.

[physicalecon]

The people that develop the project have needs like anyone else. That includes vacations.

[int_19h]

And they are welcome to crowdfund for them. But they need to be explicit about what exactly the money is funding.