Do you guys think it is viable?
How many hours do people spend here a week to earn merits?
and than you receive only (max) $100 a week?
Lol...this is concerning really as the market force has been naturally dropping the pay rate. The forum tried to establish itself ever since m!xers have left but I think the reality is bitting hard now, not more $250 or more offers. Though there are still good campaign offers, except that it is not more than $100, excluding the bonus, and with the bonus, people may still earn $160, but with some tough tasks.

It is not business as usual, but time changes and things might be reviewed upwards by the same market force that dropped it. That said, it also depends on the way you view it as the earning from the forum is a passive income, and regardless of the country you are in the world if you are earning $400, it can do some extra things for you compared to if you never earned it.
This is also with less work to do, especially if your campaign asks you to post a maximum of 20-25 per week (an average of 3 posts per day). However, this is huge money in some countries, and with that little effort put into it a day, it is a very reasonable extra income on average.