When I used to depoist regularly one deposit a week my loots at first were better. I got nice globals, some HoFs. I got pissed off when this ended. Game was bad and I lost cash. It looked like game came to the idea: "Ok, this sucker depos each time he has low cash, so if we keep him on low cash he will depo more". So I decided not to be a sucker and not depo. After few days I got back to level of ped card from times I did depo... few globals in one day and I had cash to play.
I didn't depo for over a year when I started to play and by that time noobs didn't get hofs as often as now. I didn't have globals but my loot was good enough to keep me developing and improving things I was using. I was new in
EU in times when you could loot vigi or neme parts, and GSI (known as ESI now) was possible to loot from caudaterguses and such... Sure there were days when I sweated, but still sweat was more expensive than now... other long story lol.....
I think that loots can be better after you deposit but it is not case of depositing itself. If you have lets say 70ped and you depo 200ped to do a big hunt for all that cash you are more likely to hit a global than with only 70ped. So it is not the case of deposits itself but more a case of peds you use for one run.
It is same with mining.
Loots come in turns, I happen to have 20 bombs one after other with claims and then 10-15 bombs with no resources. If I take 10 bombs it is likely I will hit few claims and won't survive the no loot wave. If I take 100 bombs I will get several such waves and get claims when no loot wave ends.
So it all depends on how much you can "burn" in one run more than if you depo or not.