Hey Heather,
They do treat a handful of well known affiliates (super affiliates) such as yourself 
Even though you do not send them high numbers – can you imagine what would happen to their reputation if they did to you what they do to so many?
If you were to ever speak against them for non payment – that is worth 100s of affiliates to them in terms of reputation. I would take it as a compliment
Your word is so well respected and trusted – they could never go against you and get away with it.