Yeah all actifit posts are definitely not spam, sure many use them just for the app and that's fine, it's the curator's job to make sure not to over-reward or to potentially downvote some that may make "too much" if there is no content in and of its own since using the app your focus should be the points/tokens from the app and the hive rewards are just a welcomed bonus if you walk the extra mile. :P
We incubated actifit like a year ago and I think/hope it has also pushed some of the authors over there to go a bit further for better/more consumptive (is that a word?) posts so curators could reward them freely.