The bonuses on those Signals and Camos get converted into Expendable Bonuses.
You can see how your current inventory of Expendable Camos and Signals would convert by going here: https://worldofwarships.com/content/economic-bonus-calculator/
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The Expendable Camos will still remain after the change, but they will only be Visuals and have no gameplay effect at all. You can use them to look nice or sell them for credits.