NLnet already sponsors the development of Lemmy. They donate money when certain roadmap items are achieved (which has slowed down due to the efforts to make Lemmy scale). NLnet sponsors organizations and people that contribute to an open information society.
Places like Lemmy are not just shit posting. Just look at the immense value of the content at reddit. Google became so useless when the blackout happened. LLMs like GPT4 are trained for a large part on this human generated content. It’s absolutely vital that this information is not controlled by a handful large corporations as it is now. Federated social media could break this pattern and bring back a free and open internet.