Advertising in moderation is good.
I am in favor of it. It helps pay for events and promotes the sport in the community.
The size of advertising should be restricted to the lower panel of the main below the reef a on the bow no further aft then the end of the pulpit.

This would keep the people who go crazy under a bit of control.

We all have advertising on our boats. Just look at the logo on your sails.
Even my #5 or floper stopper has a big logo on it. So much so that when UK came to measure my boat they said they would send me a new UK one so I could take down my north one.

Advertising helps with the costs so it's good. And that's my call