That's really interesting. In a sense, you can go direct, but the product can save other designers and agencies lots of time. If the client is happy with the results does it matter how the sausage is made as long as they are paying a logo fee and not for fraudulently claimed hours worked?

That time they could save is likely much more valuable than just the one time fee, and constant improvements and features for them could very well justify a nice recurring subscription fee.

I appreciate your point that some products are really not SaaS-oriented, yet try to be.

But your two examples here seem exactly the kind of long-term customer relationships that benefits from SaaS. And may in fact be underutilized. These are high-touch, deep background kind of gigs, rather than impersonal service sites. I want to have an ongoing conversation about my task and I'm willing to pay a retainer++ for that privilege.