I was depositing on irregular basis to EU when I had money and when I needed or wanted to depo. I don't do any full time job and my income is irregular, so I don't depo every month or every week.
I didn't depo since I got my tower. My loots are good enough to keep me going on level good enough for me. That means I have enough without deposits to buy new (limited) seekers when I need them and enough to go mining. Still when I get payed for the job I'm doing now I'm most likely to deposit again just to spice things up a bit.