Improve skip button

As far as I can tell from the searching I've done, it's impossible to modify the Unity Ads skip button on skippable ads (other than changing how long the user has to wait). Is this correct? The skip button is not very noticeable. People expect to see a big button with a countdown saying "You can skip in 5...4...3...2...1", but instead there's just a little button in the corner that only becomes visible momentarily after 5 seconds. Out of more than 3 people that I've personally observed open my game for the first time, none of them realized they could skip ads. I know of at least a couple users I've lost because of this, and I'm sure there are hundreds more that have remained silent. I've resorted to including a section in the tutorial that teaches users how to skip ads, which is pretty ridiculous.