I want to develop an app where the customer could log in, pay, and receive some videos & pdfs.
I guess I have three options:
1) Make my own web app
2) Make a Facebook app (account creation will be with facebook)
3) Make a Messenger bot. A person would ask the bot what they want, the bot would send them payment link, they would pay and the bot would send them the download link for the content.
The reason I am thinking of this is that every customer will have to initiate conversation with my bot, so the bot will be able to e.g. send them messages afterwards (remarketing).
So I guess my question is: would this work from a technical point? And is there any other notes or recommendations somebody can give me? Just want to see what the internet thinks about this idea. Cheers!