No catch, well for the wireless broadband Unplan, 

It just has 3 different price points (depending on how much data you use) you use less you pay less. 

For example for me, on unplan Entertainment  

* 0-60GB and pay $75 

60 - 120 GB and Pay $85 

120 - 170GB and pay $95 

* includes lightbox and netflix, with the top 120-170GB for me this is a self imposed limit for me due to the traffic limits that is on wireless broadband (not regards speed just data use) but on unlimited from what i understand it would be 120 - Unlimited GB at $95 

For me 170GB feels like unlimited as tend to only use 110 to 140GB a month so no need for unlimited 

hmm i did not realise there is data cap. I am on unlimited and I prefer to have no data cap. let me look at those plans again, data cap is bad!

just looked at the plans again, i prefer to have no data caps - what is going to happen to my spark unlimited gigatown plan?

noo :) :P thats why i said self imposed ... there is no cap 😃 just due being on wireless there is data management which spark are very clear about. 

On unlimited it will be just that 

what happens after 170GB? I can't seem to find the answer on the spark website

(sorry I don't know how much data I actually use, if you wanted to know)

Just sent you a PM :), sorry feel ive kind of messed up what you were asking, not the intention. but nothing will happen as you are on an unlimited plan so you will stay unlimited if you go over the data usage where the top price point is set ;) 

Seems to be some people in this thread talking about Fibre (which I believe the original post refers to), and others talking about Wireless Broadband.

I believe this is creating some confusion about "data-caps" etc.

As the original poster was asking about Fibre, I will reply from that point of view.  There are no limits or caps, only the Unplan feature where we only charge you for the tier of usage that you actually use during the month.  I think this is fairly well covered above.

Where exactly did you see this message?

i'd love a screenshot....