Can I host affiliate based websites here?

You can host affiliate based websites (with affiliate links, banners, etc.) without any problems here!

What are the DKIM and SPF records and how to enable them?

DKIM record The owner of the domain name being used for a DKIM signature is declaring that they are accountable for the message. This means that their reputation is at stake. Receivers who successfully validate a signature can use information about the signer as part of a program to limit spam, spoofing, phishing, or other undesirable behavior, although the DKIM ...

How to buy a VPS package?

If you have decided to buy a VPS package, please go to - https://ultahost.com/vps-hosting. By default, you can potentially configure almost anything on the VPS server if you know how to do it since it provides almost complete freedom when it comes to resource limit management. 

Are sockets supported?

We do support sockets. We recommend you to use VPS or VPS Power or Dedicated server plans.