People people!!!
I am the person who spoke for this issue. There is a planing of implementing a FUP for Unlimited Packages. HOWEVER... TRC has to appove it. During January to March a 20GB FUP was instated by SLT secretly without approval and everyone in Elakiri Talked about it!! It was the most popular thread known.
FUP was implemented because the TRC wanted a "Minimum Speed Limit of 50-80%" which is now reduced 50-60%.
Also the TRC (Telecommunications Regulatory Commission) has lowered the backbone prices in the international market! So providing Unlimited 512K and 1Mbps lines should not be any problem.