Hello,
Personally. I can recommend Stripe due to how easy it is to use, how trusted they are, and how low their fees are. If you are looking for cryptocurrency payment methods, I can recommend coinpayments.
Hello,
Currently, we use Netdata on our servers. It's super easy to understand and gives us all the details we need to know! It's actually really great and I recommend you check it out!
Hello,
HP is #1 in my opinion. I had Dells, Supermicro's and HP's. Dell is the worst servers I have ever used in every way possible. I guess it comes down to preference and what you are filtered to.
Both are great for different things. From our companies personal experience. AMD is better for lower loads, but works faster. Like a RPC or maybe game servers is a good idea for a AMD processor, however Intel is most likely better for like a Virtualization server.
Me personally, location really matters to us. Latency and where you are located matters more to the customer actually than it does to us. We are located in Ashburn, VA as it's basically the hub of the internet!