VOX went the same route with specials that Afrihost did a year ago... and hey, what a surprise, SAME RESULT.
You can't keep giving away / having specials without increasing capacity. One may argue that it is difficult to foresee how much capacity an ISP might need, but you can easily judge by the uptake on all the specials you run, and order accordingly.
Currently, VOX is the worst performing for me in CPT, but I have noticed similar issues (browsing/packet loss/latency spikes/timeouts/etc.) on other ISP accounts. There is definitely an issue in CPT at the moment... let's hope it gets resolved quickly... the longer it takes, the more compounded it will be, and the more we will notice all ISP's having the same issues - that would be disastrous for ALL.