I remember when there was postoken ICO refertal campaign and they were not encouraging deposits for referral earning however the referral program was especially for bitcointalk forum members. Each successful referral was set to give you 5 postokens equivalent to $10. I used telegram groups and twitter to share their advertisement. Postoken is still considered a good coin. If you have any similar programs, i wwould like to join
I did remember that one about some certain task specially on referral links on Postoken which isn't really necessary for you to do such thing but still a good way for them to market their project by means of scattering links by its users or participants. I did make some good earnings or profits on posttoken as far as I remember. Checking links above given I would try out and search for them if it would really be worth it or not.