Inactive Players
From OGame Wiki
An inactive account is marked after one week of inactivity.
[edit] Inactive Players
If a player does not log in to OGame for one week, all the planets of that player are marked with a (i) symbol in the Galaxy View. The mark becomes (I) when the player does not login for more than 4 weeks.
These players' planets still generate resources as they are not in Vacation Mode and these planets may be a great potential for plundering resources. In addition, players with Noob Protection may attack strong inactive players.
Inactive player accounts will be deleted in 35 days. When an inactive account is deleted, all of its planets become astroid field. These astroid fields become vacant slots after two system updates (which takes between 24 to 48 hours).
[edit] Inactive
An inactive is player who is no longer playing OGame, or has not logged in for at least a week. In the Galaxy screen inactives are marked by an 'i' if they have been inactive for one week or longer and an uppercase 'i' if they have been inactive for at least four weeks.
Inactives are also very good for raiding, as you are a far less likely to be scanned back or get hit in revenge. Most people can make a profit by raiding inactives on a regular basis (unless of course everyone else is raiding the same inactive)
But be careful: Since a player with a Sensor Phalanx may be monitoring local inactives. If the inactive is in the same Alliance or on their Buddylist in an Alliance Combat System universe they can Ninja the attacking fleet. Or they can time their attack to land seconds after your attack returns, before you can save it.