why not?
100 tokens is, for most people, the equivalent of 30-60 minutes work (Depending on your job + country).
If you were saving tokens each day, then of course you wouldn't buy a fancy emblem. That would definitely be crazy.
But if you're spending a decent amount of time playing top11, then you get pretty sick of looking at the same crappy logo every day. It doesn't really fill you with pride when you look at your team and it's a crappy 2 colour logo lol.
At least that's how I felt before I brought my logo, although admittedly brought one which was around 30 or 40 tokens I think. If I was a football fan I might have spent more for the logo of my favourite team, but I'm not so just choose one which looked cool lol.