these gpt wrapper apps as a business model are going the way of the dodo, things are moving way too fast
If you go to the website of markprompt the people who made it already appear to be accomplished entrepreneurs, having worked on something called Motif, which I hadn't heard of but appears to be legit.
They also have a nice website and everything I read makes it sound like they know what they're doing.
These don't count for much but they count for something. I haven't investigated them much but I think this should be assessed like any other startup product.
You can probably also ask openAI about the nextjs/tailwind starter repo everyone of these wrappers keep relying on too.
Reminder, it's going to get easier to implement things. It is going to get easier to support things. Neither of these two reasons are going to be the catalysts they used to be for businesses anymore.