If you are running a serious business, $5 bucks a month is not a lot.
You WILL get something cheaper than that, just keep in mind that they might not be as realiable as what you'd like it to be.
Assuming you are not being sacarstic...LET = LowEndTalk, which is the forum for LowEndBox which is like the first ever blog for LEBs (and the reason why LEBs are called LEBs :) )
I am pretty sure when things like this happen on LET they will normally blame DDOS for it.
However I thought CC already have DDOS protection, can't they just put LET on a DDOS-protected IP?