Nothing is free on the internet. Its high time we accept that and choose to consciously and directly support services we use. It's just cleaner that way. It's also the only way to keep the internet free(free as in freedom).
Think of it like donating to Wikipedia - once I was able to give back, I started giving back. Soon, I hope to start contributing to lemmy OSS.
This is not even taking into consideration the practical issues with awards like the amount of dev and effort needed to create and manage a payment and "donation distribution" system.