>I think since it’s not core to their business

This is exactly why you shouldn't use Conbase

I think since it’s not core to their business, they don’t have much motivation to build it themselves. I’ve never used Coinbase but I assume they have some third party integration for on- and off-ramps, which is basically what this is. 

WeAreAllSatoshi

I’d guess it was more like “we can pay someone to figure this out” but maybe even wanting to outsource suggests lightning is too hard.