Omaha8 hand selection queires

[RobCee]

Thanks to those who responded to my last post I've now logged about 25 hours of Omaha8 on Partys $0.50/$1.00 tables and have a couple of questions regarding hand selection.

During my time at the tables I've noticed that a lot of players seem to play any four cards seven or under and A2XX. Why are players so keen on going for low when there is always a high but not always a low, and winning low hands get quartered more often than winning high hands? Surely they should be looking to scoop or win high and be mucking hands with only low potential.

Secondly is A2XX a playable hand? Currently I only play A2 if one of my other two cards is a 3,4,5,or 6 and my ace is suited. Is this too tight?