Yes they still pay ! I stoped uploading 6 months ago but i continue to earn (a little) with ul.to
The real problem with ul.to : They always change their affiliate program. Firstly (before the shut down of megaupload) , ul.to paid 30€ per 1000dl ( gold group). After that it was 10€ per 1000 dl (+ 1€ per sale). 1 month later it was 7€ per sale + 1 per renew. And few weeks after it was 60% per initial order + 30% per renew (until today).
And the new plan now is : 10€ per 1000 dl (gold group) + 20% per sale + 5% per new.
So in 6 months they had 5 affiliates program ! I'm sure , the next month they will change it newly !
Conclusion if you want stability : don't use uploaded.to !