IMO I agree that the real problem is the last one. GrubHub has a history of this, basically co-opting restaurants brands for their own benefit.

https://www.theverge.com/2020/1/29/21113876/grubhub-seamless...

Also they then use SEO to get their own phone numbers and website higher than the actual restaurant's number/site, basically guaranteeing a cut of any phone/website order, even if the customer doesn't want to go through Grubhub.