Ad Tokens

Ad Tokens were added in Scrap Clicker 2's 4.0 update, allowing for a player to skip watching an ad in exchange using this token which they could purchase with real money.

Ad tokens were added into ScrapTD in version 0.5.

They also exist in Music Maker.

Obtainment
In Scrap Clicker 2, Ad Tokens can only be purchased with Euros in countries which use it as its official currency:

Ad Tokens may be earned in ScrapTD by watching ads or referring new players who then continue to reach level 4. Each recruit earns 5 Ad Tokens for the recruiter and the recruited player is given 1000 Bricks for joining.

Use
Players who do not wish to waste time viewing ads may benefit from purchasing Ad Tokens to use later.

Using an Ad Token also has the benefit of never needing to worry about an ad failing to load and the player's bonus reward being lost in ScrapTD.

Gallery
Ad Tokens