We do have prefixes for users who donated a lot on Classic and Agharta. Donators also have a prefix on Prison as long as they donated $5 or more. Staff have prefixes on all servers. However, it was never necessary to say someone was a member, or even the amount of time they have been with Minetown. Guests on the greylisted servers do have <Guest> in front of their names, as you pointed out. As another example, Prison has prefix for new players on that server.
Minetown is not "other servers". We have our own way of doing things, and its worked extremely well so far. Also, before this goes any further, let me point something out to you that is in our rules:
The Rules wrote:
2. Be Respectful to Staff
Use the available methods (petitions, forums, site messages) to request help
Do not demand/beg for staff to do things for you
Do not ask for Ranking/OP
Do not interfere with staff duties
The prefixes that are available on the servers are what's available right now. Please don't escalate this any further, as you may find yourself in violation of the red and bold points in the quote.
Thank you.