Each toy comes with its own ID number and you have to input the ISBN to access the survey. So I doubt that older Encores like Sky Lynx will open up the newer surveys like the one that comes with Fortress Maximus. You can see that this survey has some Fort Max specific questions (such as mentioning the fortress and city modes). The Sky Lynx survey will more likely open up the older survey as shown in post #1 and #5 of this thread. Nothin' wrong with filling the survey out, but I wouldn't expect it to have any of the newer questions, especially the one asking you to select/nominate future Encore characters.

But this does give us hope that TakaraTOMY is going back to the good old days when they were more willing to listen to collectors (Hasbro certainly seems to be going toward that direction too). I was quite surprised to see the Dinobots as one of the options -- it shows that they're willing to consider going to the expense of reconstructing lost moulds!