Indeed, that article doesn't support a single part of that claim.

It kinda feels like an LLM-generated article that another LLM picked as a "citation", and then no human bothered to check if it actually said what the LLM said it did.

And, really, advergroup.com? Who sites an advertising agency as if it's a reliable resource?

https://advergroup.com/digital-marketing/

"AdverGroup Web Design and Creative Media Solutions is a full service advertising agency that delivers digital marketing services. We manage Google Ad Word campaigns and/or Meta Ad Campaigns for local clients in Chicago, Las Vegas and their surrounding suburbs."

So credible a resource on Gemini's performance/profitability... /sarc

But yeah it doesn't even actually say anything about profits, let alone attribute any specific percentage of profits to Gemini. It just vague marketing copy.