That is a good point but the countless complaints I read on the FB Groups is that 3rd floor prizes are not worth the cost. If the prizes were better then more would strive for the Top of the Spire, therby creating more Gold Spire FSs. How many Gold Spire FSs are in the worlds you play in, maybe my world is just a lackluster world for Gold Spire FSs.
Just because it's on facebook doesn't mean it's true.
It makes a huge difference if someone explains why it's worth it.
Just as an example:
I once joined a group of newbies, they did not understand the tournaments and thought it was a waste of time, I helped and explained why it was good and most of them became very active tournament fanatics.
It makes all the difference who you talk to, If you join a FB group and everyone tells you level 3 sucks then you never question if it really sucks, you just accept what everyone is telling you.
It takes a few people to tell otherwise, then they discussion starts and minds can change.
If it ain't challenged it will be accepted as the truth.
The spire is the main source of free diamonds and most of those are in the 3rd stage.
For someone who spends $50,- a month on diamonds that person most likely won't care, but freebee players it's the main source of diamonds.
I recently found my list back
220 of the 434 diamonds are earned in the 3rd stage, that's about 50%
There are also additional chances on dwarven armouries and artefacts, both in extra chests as in boss reward.
And last but not least: almost 50% of all timeboosters, 1 teleport spel, 50% of all catalists are earned in the final stage.
Thats a lot, the issue is it only it 50% of all spire prizes if your fellowship also get's there and you aren't the only one going for it.
When people get too frustrated they will switch fellowships, but as
@SoggyShorts already mentioned the step to leave those you know behind because you have different interests is a huge step for many and often a step too far.
But really the spire is a gold mine, it keeps giving and giving as long as you all work together.
And 434 diamonds is a very generous reward. there arent many games where you get the payed currency that much that easy.