Maybe block all mail ports on the servers, and allow them to relay via a secure setup mail server that is controlled by a few firewall rules with some software such as ASSP Deluxe for example, that would detect and filter spam correctly, that way you have a full control over the mail issues.
Definitely forums and directories, or choose some good reputable marketing companies. Google ads, and bing are fairly expensive and if you don't know how to deal with it you'll lose more than you earn, but don't forget organic is the best, so think of it on the long run too...
There is no better than payments via PayPal using their balance or using their card/bank, echeck is just a pain for every business, they take ages to clear and customers would get very annoyed by that, and you just can't take the risk of giving them services because the check might and might not...
Maxmind is a great tool, but I believe that using common sense, observing the abusive behaviours, learning their tricks and spotting their repetitive retries would help you control it to minimum.
1. Is DDoS Protection important to you? Does it add value to the service you are buying from?
No.
2. What is your personal favorite - OpenVZ or KVM?
People would choose the platforms depending on their needs, some go for openvz, some for xen and some for kvm.
3. Do you prefer to pay a bit...
It's definitely better to offer the clients the options, for example none free panels: direct admin, and cpanel, free panels: webmin and kloxo, in the end of the day what might seem good for you isn't really good for someone else.
There are many providers out there providing DDoS protection and guarantees of such protection, the best way is to find a suitable provider for your needs, if you're attracting DDoS intentionally over and over then that's your best way of dealing with the issue, on a side note there are several...
Hi everyone, I'm Alexander Freeman from HostSailor, and I have just joined vpsboard today, hope I will be able to contribute to this community and also to learn a lot about the community and vps industry, thank you!