3. Sort by topic score descending, and secondarily by the usual last post time.
Hello,,
Why don't you randomly choose to your own score sources for the ANN Altcoins board. You can choose from some DT members, merit sources, members who often carry out investigations / reports against scam ICOs or whoever you think is appropriate. Of course you have to choose them in secret and (optional)do that together with your trust team/members. So they(score sources) were chosen without their knowing it.
And to make it more perfect, the score will be obtained automatically when the score source makes a post (only the first post is worth the highest score for each source score, for next the score is smaller than previously) and the score should be counted every 24 hours or weekly(if not possible to collect more scores fastly) according to when the post was made.