I may be mistaken, but "tracking" just means a shopper used the Rakuten extension or went through their site so it's successfully logged as a rakuten transaction, right? Cash back isn't known for sure until after TA/Viator confirms the sale and approves it as CB eligible?
Unfortunately, I bought too early, as I have a fixed party date and didn't want to risk a sellout: so only 4% vs 10% or 12% CB.
I seem to have the worst luck trying to time Rakuten CB: I either buy something big and non-refundable a day before they blow out some 2x, 4x, or 10x cash back promo - or wait for a better deal and the price on the stupid thing skyrockets in the meantime!