Hey Velo welcome back, good to see you again!
We all congregate on our Discord server now, it's public and free to join: https://www.opticraft.net/discord

As for classic, Optical has the server running on ClassiCube which can be downloaded here: https://www.classicube.net/
Just create a new account there with the same username you had on classic, download the client, and browse for Opticraft Dev Server.
ClassiCube is an open source alternative to classic which is virtually identical to the original experience.

Hope you see you around!

Donations are being finalised and will be live very soon. Rewards will still be limited to cosmetics but we have some nice things planned.

We're currently waiting for Bukkit/Spigot to release stable 1.13 builds, as well as plugins to be updated. Unfortunately due to the nature of the game this is a lengthy process and so we have no eta on this. With 1.13 being the largest update to date it will likely take a little longer.
We'll be sure to update everyone here and on Discord once everything is ready.

Just a quick update here. Mojang aim to release the 1.13 update on Wednesday, July 18th. More information can be found here: https://minecraft.net/en-us/article/minecraft-113-pre-release
We still have no set date for our launch, but if everything goes smoothly we hope to have it ready shortly after the release of the 1.13 update.

Rules

No griefing
Do not modify another players blocks without their permission.

No obscenity
Do not create any vulgar or offensive structures or signs.

No spamming
Do not send unsolicited or repetitive messages in an attempt to force a message.
Do not use excessive profanity, moderate use is ok.

No advertising
Do not advertise or promote other game servers or services.
Do not sell or promote any products or services.

No ban evading
Do not login with another account if one of you accounts is currently banned.

Be respectful to other players
Do not provoke other members with the deliberate intent to evoke an emotional response.
Do not abuse or insult other members under any circumstance.

Use your common sense
If part of you thinks what you are doing is wrong, then don’t do it.

No mods except for Optifine and Shaders
If the mod does more than change the look of the game, it is prohibited.

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Guidelines

Locking container blocks
Container blocks such as chests and furnaces are locked upon placement.
Do not unlock container blocks or give untrustworthy players access to them unless you are willing to lose the items they contain.
Players are allowed to take and keep items from unlocked container blocks.

Dropping items and experience
Items and experience are dropped and scattered on the ground upon death.
Do not drop items on the ground or trade with an untrustworthy player unless you are willing to lose the items.
Players are allowed to find and keep items and experience on the ground.

Claiming and protecting areas
Server generated structures, blocks, and entities are owned by the server.
You can not own any of these simply by stating that they’re yours.
You must use protection fields or fully enclose them in blocks if you wish to protect the area for yourself.
If a player griefs your blocks to gain access to the area and causes additional damage, then the area in question will be restored.
Players are not allowed to use protection fields on structures built by other players.

Redstone machines and generators
Redstone machines must have an off state and should only be used when you are online.
You may AFK by a redstone machine, but you must not bypass the AFK auto kick in any way.

Looks good to me

Thanks for the feedback. I've added these to our ongoing list which will be reviewed in time.

Maybe one day