Research P2P Altcoin Exchange?
Thanks for trying to get feedback for your plans from BSV Forum. You might get more replies from Twetch.app, but there's "quantity over quality" mentality, as I'll demonstrate by writing here a more thought-through answer than what you'll get from anywhere else. 😉
I think it's important to have as many bridges between different altcoins. The bridge you're planning is a technical and a marketing challenge. The technical part is to create a service where different payment options are accepted, and that supports many altcoins. It's like building a website that converts currency A's exchange rate to currency B. It's easy if there's just A and B, but the more of the alphabet is added, the more complexity... With the part about payment options, Anypay* looks really interesting, but it's not covering the whole range of payment options you'd like to have.
Marketing: if you build a service, like this BSV Forum, it can be functionally quite good, but that doesn't guarantee it's going to be popular. Lol, this forum is a real-life example of that.
*) Anypay: https://anypayinc.com