I've seen these before; it feels way too intrusive and out of place on the page. If I'd clicked a "sign in with Google" button, then okay fine, but a big dialog

I've seen these before; it feels way too intrusive and out of place on the page. If I'd clicked a "sign in with Google" button, then okay fine, but a big dialog covering the corner of the page? No thanks. Checking out that page, the traditional signup button (which is what I'd use as I'd rather not use Google login) is actually under that dialog. You can't see it until you dismiss the dialog.