On TokenAds I too don't have any offers available for quite some time. So its normal.
SuperRewards has about 4 offers for me. The other day I completed a survey on SuperRewards. Check here
On another PTC site which I am a member of, I have a blank SuperRewards offerwall. Sometimes I have offers and sometimes its simply blank.
Maybe these offerwalls audit some accounts from time to time and don't show those users any offers till they finish auditing their accounts.
You can check on another computer or on your mobile to see if there is something on your computer which is blocking the offerwalls. Add-ons like NoScript, AdBlock, etc. are known to cause issues.