Profitable yes. Worth it, no. Unless you can figure out a way to run bots to do all the work for you, its best to stay out of them .
Running them however might be worth it, if you can get a lot of traffic
It's not that hard to get traffic to be honest. In my experience, the more stable you are and the higher reward (obviously) equals more traffic.
On the first day of my faucets launch for example, we ended getting 50k visits. and the next for days totaled up to 500k+ ( 130k / day )