yes exactly. They made an option that we can defined our brand info there such as name, slogan, logo and also set a free and own DNS and sell under that.  Check it out here: https://iptvstack.com/article/5a2ff6143762b046fd404c6c/Dashboard%20settings%20section%20explained

Yes bro there is. Just take a look at https://iptvstack.com/resellers
I`m working with IPTV Stack for 1 year. In the link I send above, you can see the options they offer you in their custom dashboard. They have Card, Bitcoin, and also Litecoin payment. I always pay in BTC and my credit will be added under 1 hour after confirmations.