Fandango offers 600 points ($6) rewards after purchasing 4 tickets. Unlike Atom where you have to make 4 individual transactions (different movies / times), with Fandango it is just the number of tickets purchased.
For a limited time, each ticket purchase is 300 points, so you get $6 rewards with just 2 tickets.
For AMC Stubs (or Premiere) members, Tuesday's 2 tickets would be $10, and you get $6 reward for next purchase.
Rewards expire 14 days after reaching 600 points. Can book for future dates after the 14-day period, if booked in advance.