They do, but I've found it minimally effective. They push the ballpark app so hard that I suspect in most cases, 1 guy has the tickets on his phone for his entire group. Well that group probably has at least 1 person with a purse/bag...so they can't exactly leave that person in the bag line and the other 3 go through the express lane. With a paper ticket you could do that, but most probably wouldn't. Do you think any guy is going to leave their wife/girlfriend in line while they go through the express lane and waltz on in? I have seen that happen more than once at Packer games.