The next Lemmy version will add a donation dialog, which is shown once a year to every user, in order to increase the amount of donations for Lemmy development. You can see the current text in the screenshot above and in the translations repo. You can also checkout the frontend PR. Is there anything you would change about the text?
The dialog can also be translated using weblate (although thats not currently setup for 0.19 backports).
And the dialog cant be linked from other places. In any case we can still make changes after this is released based on feedback.