I am loving all the updates here.

HMT
Great news,

somewhere between 2 hours and 24 hours at most.

I will say 24 hour , because I guess there are so many like me that come daily to platform but not in every 2 hours.(everyone has a job to do) checking at every 2 hour is not feasible at all. Give more power to daily users in turn they will give more power to hive.

rating system using web-of-trust concepts

That make a marketplace in Hive very unique.