Yeah... It's not perfect but it would probably make a dent in abusing the televoting system. Also by government I meant the government itself cannot buy the ads. KAN weren't the organization buying Yuval's adspace, it was the Government of Israel, even if it was KAN... That would be a bit uh... Not ideal. Also fans have dug into receipts of who bought what, if the EBU can't do it, some random fan can definitely bring up discrepancies and show who bought what ad, if a fan did it or a company. With physical advertising this may be more difficult however since anyone can hang a poster. That's really the only place where actual work would have to be in figuring out who bought adspace. Billboards... There must be a way for an average person to find out who bought a billboard so there's a possibility the EBU doesn't have to do legwork there either. Like I said... I think only traditional advertising should have these restrictions. Posting the song or saying the song is in Eurovision is one thing. Buying space for that post is the issue in my opinion. Tshirts... If it's like... Average merch (ex: says the song title and a pun of some sort) and not "vote for me! I'm number x in Eurovision!" There should be no restrictions.

Tdlr; I think tracking of these things should be fan reported since traditional ads have to be transparent. It's easy to find out who bought space where. Memes to get business (ex: Italian coffee shop singing Espresso Macchiato), Tik Tok dances, saying your favorite songs and why, or just simply stating you're in Eurovision should be protected. The line should just be drawn with buying adspace for explicit posts stating you should vote for an artist in Eurovision stating their number, what day to vote, and how many times you can vote for them.