There are programs that have stood the test of time. Many of them have grown with us, done things we don’t like, and adjusted over the years. These also have done well by players. All of them have had some hiccups over the years, I can’t think of any without hiccups.
While it may be difficult to accept anything as solid these days, off the top of my head such solid programs are Referback, Casino Rewards, Fortune, Blasters, Slotland, Casinoprofitshare, Brightshare, Referspot, Wagershare, Intertops, Inetbet, Roxy, Bodog, Wager Profits, Casino Coins, Income
Access, Focal click, Vegas Affiliates, Vegas Partners, United Partners and Partnerlogic, in no specific order.
Some or all of these are grappling with the current situation, but history is on their side.
Newer programs that have established themselves well are 400 group, World Club, True Earnings, Hype, Best Casino Partners and Pantasia. Up and coming seems to be Superior Share.
This is from my experience and not a complete evaluation. Some I just never did business with for various reasons, and some have had problems in the past I find hard to forget.
Which programs will do best for you on your site is a different discussion and depends on many variables that have nothing to do with the honesty of a program. These are simply programs I personally trust.