First thing first, congrats to WGT for the improvement of the "earn free credits" page. 2 years ago, for a francophone, it was a nightmare... Now we can actually earn some free credits (more surveys, more offers, no scam survey so far, and it's working.).
So, well done WGT & mea maxima culpa (I said bad things about the free earning possibility for a non-anglophone by the past).
But (yes, there is a but) I think there is a bug somewhere... With the daily surveys:
Since the 6 of march, if I do a survey (iPoll, Your surveys, Samplicio, etc.) from the "complete offers" tab (via Trialpay), I don't receive my reward... The survey isn't even listed on the assistance popup. In contrario, the surveys from the other tab ("take survey") works well.
Is that a known bug? Trialpay is broken? Will we receive our credits one day? Thanks for the reading. ;)
tldr: Waiting for reward credits (maybe 750+ credits) from completed surveys (maybe 10+, hard to say, not listed) done since the 6 of march.