By software, check out Vegas Tech (Casino coins and best casino partners), RTG, Rival, Topgame and Slotland.
Since you haven’t been around much, I would check my list against the Casinomeister rogue pit to avoid issues with individual programs. Also check the threads in the program forums here on CAP to see if issues get resolved promptly.
Also, on the bottom right of this page you see a link to the affiliate votes for approval – this is still in it’s infancy but the programs approved there are voted in by affiliates and it’s a good base for decision making.
It’s a bit more rocky now than it was back in the day, so I recommend due diligence.
But you are right, you can still make a good go of it.