How about a platform where users can meet others who wants to split for a premium service?

Look at that: https://www.spliiit.com
I think this is what you mean. I only heard about it one time on the television but I don't think people are using it so there's definitely something to do. Just be careful with the legal aspect of sharing accounts.

You might break EULA's
But in a perfect world if you can grow the userbase of those services and generate good revenue for them, then you will probably be able to negotiate and make a deal letting your users share an account.

It seems like a great idea. If you can pull this off. It would be a great success.

It sounds like a good idea, because people are actively looking for someone to split the bill in other places (social media, friends, friends of friends). However as many people suggested, it is probably against terms of these services.

However, maybe it's worth exploring if you can collaborate on this with the services themselves, e.g. you get a small fee or a referral bonus when you bring new users to their platform.

https://play.google.com/store/apps/details?id=elope.crazyones.com.coffer&hl=en

This one cool but you'd need to handle legal things. You can contact me. I can help you out.

Have you ever gave a thought about violation of EULA (End User License Agreement)?

I was thinking about this the other day - a product like AHREFS was front of mind. However, I reckon they’d update their terms to prevent this type of thing pretty quickly.

there's definitely a market for that but you have to be specific about what kind of premium services,it has to be something that allows users to each use the service without cluttering the other user's personalization,and I'm wondering how do you plan to monetize on such platform

I feel like there is definitely a market for this kind of thing. Update us if you decide to try it out.

like what? a netflix account?