They may possibly be breaking Premier rules - the problem being though there is no definition of Concessions. I know this from being in a meeting with Hull City fans and the Premier League - their former owner also removed OAP and certain other concessions. The Premier League were very unhappy as I recall but it was difficult to take action as every club merely had to offer concessions, it wasn't defined what that meant. The Premier League did talk about maybe having to make a definition. This was a few years ago though.
The average age of Premier fans was in the 40s when we were in the league in the 1990s. That age level will be much older now as demand and waiting lists get longer for the bigger clubs. There will be a really big proportion of Spurs support in the OAP bracket. Their own fault really in not opening up the stadium sufficiently to younger fans. Spurs attract a large number of football tourists on match tickets but also on season tickets. But surely this will backfire on them. Big style.