Soliciting donations without a permit is potentially illegal in my country, so selling a worthless item might be a better way to go about it. Might be something like that.
Wow, a permit is 300 EUR + 120 EUR / year. There's no way this can really cover a single person asking for donations on their website, can it? That's insane.
It also looks like you need to specify information about your "organisation", including specifying a treasurer? How could a single person even fill this out if they wanted to?
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It appears permits aren't given to individuals and there is simply no legal way for a given person to ask for donations in Finland.
I think it's a non-issue since I doubt this would count as a donation in a legal sense. It's the same with Twitch streamers. You pay them because they do X and then it's a regular work income, not a donation.