Doing a 1:1 comparison between what you're currently receiving on import and RADB isn't completely fair given most folks who preallocate address blocks will register route objects long before they are actually used.
What is preventing you from crafting your import policies based on this data? Google is clearly creating route objects for most of their prefixes and rejecting a handful of prefixes vs. the risk of accepting at worst a full table seems like a reasonable tradeoff. This is something Verizon could have done, and something other folks like Level3 have done for some time.