sure, for example ,
they are required to work 17 days a month, and are gateway base ( not home based) , what this means is that when the company buys them a ticket from their gateway to where the airplane is, the price of the ticket gets input as income, and ou get tax on it . also your 17 days off can be extended to 21 and the extended pay is pitifull. futhermore, if you happen to have a long layover anywhere but your home ( as it happens a lot on ACMI flying with customers changing the sched all the time) the company can call those layover days off days , and you will get taxed on the hotel and if you want to go home you will be taxed on your travel. also, lets say you get lucky and you get a line where you work only 13 days, well, when you are home on your days off, the company can call you and say " hey buddy, you owe us 4 days of work , get to work or you are fired, and yes we wil taxed your travel
travel taxation is so bad that you can end up with negative paychecks( as some guys have), and the comany has the right to send you home and call you back out again as many times as they want to to complete your 17 days in one month. but it gets worse those travel days to and from your gateway to get to work are flown on your days off without extended duty pay.there also is virtually no scope protection, and if you calin sick a couple days before your trip when on days off) they take those sick days you where off .
there are a lot of other horrible things in the contract, maybe some atlas guy who reads this can send you a link t their contrac on the net and you can see for yourself.
again , if you have over 1,000 of 121 jet pic and wnt some heavy jet time, go for it, but think of it as a stepping stone to ups , fedex or even frontier or jet blue.
hope this helps