I dont really use it much tbf just thought it was a cool project but I've just read about how lemmy instances can be fined for not complying with GDPR Read more
IMO the fines are made to sound scary, and are relevant for large corpos, but the ICO or whatever body for your country, has no interest in prosecuting an individual. What is a ‘percentage of revenue’ on something that makes no revenue anyway.
Even if they did take interest it would start with an opportunity to correct things before prosecution.
The fines usually are a percent of revenue or millions of Euros, whichever is higher.
So if your revenue is 0 EUR then they can fine you the millions of Euros instead. The point of the “percent of revenue” alternative was for larger corporations that can get fined tens or hundreds of millions of Euros (or, as it happened to Meta, in some cases -- billions of Euros for a single GDPR violation).