It's more like a move to earn as much money as possible while the market is still bullish.
Yeah, Bitcoin is probably getting the most media coverage as well as several infulencers now promoting either Bitcoin or cryptocurrencies. While this isn't particularly useful in the long run, its definitely increasing the amount of people who are investing in Bitcoin, and while its good news that Paypal now seem very pro Bitcoin, and want a slice of the pie that doesn't mean its going to be a permanent addition, and could easily be removed once this initial hype dies down.
The other advantage I see, and it's a small one, are those people who want to buy crypto though Coinbase but do not want to give them their banking information.
Yes it costs you a bit, but unless they changed something you are still getting a buffer that Coinbase never sees your banking information.
Also, if you sell on eBay and have funds sitting in your PP account you can now get BTC without moving it to your bank 1st so that is good.
-Dave
I'm not all that familar with Paypal I'll be honest. However, wouldn't the invoice which has been generated still have the card number that was used. As far as I know, Paypal has to have a bank card linked to it, which displays account number, and card holder name. So, Coinbase would still have access to that information as a invoice would need to be created.