This, 20 likes during 100 days is required for become a regular.
Regulars are the most active readers and reliable contributors over long periods of time.
They can get to trust level 3 by...
This is time and activity based, unlike the previous levels. In the last 100 days...
must have visited at least 50% of days
must have replied to at least 10 different topics
of topics created in the last 100 days, must have viewed 25% (capped at 500)
of posts created in the last 100 days, must have read 25% (capped at 20k)
must have received 20 likes, and given 30 likes.*
must not have received more than 5 spam or offensive flags (with unique posts and unique users for each, confirmed by a moderator)
must not have been suspended