A few thoughts:

1. They don't have a standard journal style. I want my Lancet paper to look like a Lancet paper, not just "be fine".

2. I'd have to find them. The journals do it for me automatically on submission.

3. For a lab just starting out, there is no such thing as "very little money".

1. They can make it look however you like. They don't because they're not allowed into that particular market.

2. They're all over those sites. And the journal takes a lot, apparently.

3. A few tens of dollars? How many papers does an academic do in a year? They really can't afford a few hundred bucks?

I think if the publishers weren't in their near-monopoly position, money could be found for this. Heck, someone will probably write an AI that does the formatting in the right style soon.