I know this is an old thread but I'll have to chime in with eLdIaBlo on this one.
I don't send them much ...they have been converting pretty consistently for me BUT things have been weird there lately.
A shitload of downtime, by a shitload I mean that several times when my stats are off or just randomly I check my links and their page has been timing out.
I come to GFY to see if I am alone and apparently so as I never see a thread about them being down, whereas if AFF is down for 5 minutes there will be at least two threads about it.
And never a mention about any compensation for downtime.
Also my stats with them have been extremely consistent, 1:20 - 1:30 EXCEPT on the first or last day of a pay period when several times ratios have been 4 or 5 times worse than normal. 1:100 plus
not sure the reasons.. hope it's fixed soon
