When it comes to covering an entire generation, it is kind of inevitable that between the oldest and youngest members, the age difference is large enough to include a parent-child relationship in here. The reason we are introducing a cutoff age now is largely because we are approaching the point where the gap between the oldest and youngest members could feasibly account for a grandparent/grandchild relationship.
But yes, I do not want to rule out the possibility that there may have been a little variance in the top end of the age range in the past; I do not remember the details. But I am fairly certain that it was always somewhere around the age of 40. That was the case when Stuart and Karla, two members from the early days of IYNO, who joined our staff at about the same time I did, decided to lead by example and leave back in 2013/2014, setting up a forum without an upper age limit that we would end up directing people older than our target demographic to. Danee in fact encouraged them to stay, but they were concerned we would risk our youth focus if members who grew out of our target audience would stick around forever.
You might be mixing things up with YNAI, a community that is now defunct after several sudden changes in ownership. I believe their upper age limit was a bit lower than ours, but I am not sure, had not been very active there for several years before the site went offline.