Millions of people use Coinbase,according to Coinbase.
The news about Bitcoin Batching are just a marketing trick,nothing more.Many Bitcoin newbies aren't that tech savvy and don't know what Bitcoin batching actually is.I guess that Coinbase wants to target them.
In my opinion,Coinbase is the most "fiat oriented" company in the crypto world(in a bad way).Even their CEO showed that he is a BCH/BSV supporter and criticizes Bitcoin Core for "not being able to scale" and other BS.