That said, I love MB and MB Way. What an upgrade it's been over paying for stuff in the US (where I lived before moving to Portugal).
I was buying tickets on MB, before it became common place in the Internet.
All the stuff I'm familiar with is only payments (with entity and reference).
Now that I think about it, you could search for things on Minitel but I don't remember if payments were made as phone charges or if they could also be done with transfers.
Minitel was so prohibitively expensive to use (just about every service cost multiple francs per minute), I didn't do much with it.
https://immolusitania.ch/the-real-deal-with-atm-machines-in-...