there are too many variable factors to give up hope completely!
much as the cam-fans use his surviving eviction several times as an indicator of a large fan-base i still have my doubts his "positive" support is that solid! - alex-fans claimed he had a huge "positive" support last year and were very much proven wrong on the final night.
Pasta is right in that it will, in part, depend on who goes on thursday and any subsequent transfer of support. also, while cam seemed to beat nush resoundingly last night much of that was not due to cam-fans (tho the extremes of some having companies' work-phone-lines on redial - vote nush - undoubtedly helped

.) but due to people who didn't like nush for many reasons. many scott-fans (teens) voted for nush out of jealousy, others weren't particularly fond of her percieved flirtiness/manipulation...etc. much of the supposed cam-fan-base lies with the older viewer who tends to be much more restrained in only casting 1-5votes....the demographic likely to be supporting scott and ray are far more likely to vote more often. tis even possible that cam/steph natural voters (jesus, help them) will be split!
this week's vote requires a "positive" vote, the only hm/former hm who has tried and tested that in BB4 is Jon!
while ideally i would love to see either cam/steph go on the thursday night (to wipe the smugness from their faces) it would be better if it were either scott/ray at that point as then the teeny/etc transfer would probably go to the remaining guy!
it must also be bourne in mind that C4 does seem to be shifting slightly in their coverage of cameron...this shift may continue and if Jon were to ensure cameron was riled throughout the week then there may be too much bitching and threatening behaviour for them to edit 'cam as lovely' successfully! today i had a chat with a friend who has loved cam throughout (C4 only) she has started to revise her opinion merely by finally seeing the odd-betraying look from cam and also by virtue of having babysat last night in a house with E4 access...her turnaround may reflect others'!
more ought to also be made of cam's "in it for the experience"

deal with his brother - julyan and his % (agent) deal and julyan touting cam around the media before he's out of the house.
i'd just prefer not to be defeatist till davina calls it...if too many people are then cam won't be stopped - i'd hate him to win because all of us have allowed ourselves to be sucked into a self-fulfilling prophesy!