Here is a tip that I didn't know about until I recently tried chasing fast on the Fubar App.
Go to what section you want of those who are online.
I chose Noobs, go to first profile pict tap Valentine or Mardi Gras icon.
Then immediately swipe to the next profile tap a holiday icon twice, you will see the icon dim,
Swipe to next profile pict double tap icon dims, and repeat this as fast as the mobile device can keep up.
I was able to get as many as 45/min.
If you start seein either no icons on profile pict, b/c you already did them or start seeing doh!! messages.
Then back out to the multi pict view for the section swipe up until you force the App to reload new picts, sometime you may have to do this 2 or 3 times.
Then jump back in proceed what I described above.
I was wondering how other were able to find time to do all 10k of each achievement (4 total) in a relatively short time.
Figured they had nothing else to do or some crazy trickery on computer. Similar to what I decribed in past post.
Think of it this way if you average 30/min, 1800/hr, in 12hrs you can get 2 of the 10k achievements (Valentines or Mardi Gras)
This taking in concideration of reset of mobile device or backing out tto multi view of a section.
So happy hunting, rate and comment any ideas.