I've been reluctant to engage with the arguments that climate scepticism is the product of massive pollution-industry funding, because I always felt that the truth – that the public climate scepticism movement relies on the work of a handful of amateurs operating on a shoestring – was more embarrassing to the sceptic cause than the "well-funded denial machine" fantasy.
Meanwhile, it acted as a useful filter: anyone who pushed the "massive funding" line, either knew nothing about the debate (which is not a fault, but is worth knowing when you're discussing it with them), or else was incapable of recognising the very very obvious.
Thanks to the Heartland leak, the cat is now out of the bag: The NIPCC conference costs Heartland $388,000 a year to run, and the funding for the centrepiece of the whole sceptic campaign is a few back-office people to organise, and a few scientists to write papers. There's no budget for advertising or publicity, other than the website, because there is no advertising or publicity.
Oxfam have had huge climate-alarmist posters, in a campaign carried out by RKCR/Y&R all over Luton for a couple of years (anyone have a clue what that costs?). That is the sort of thing that sceptics don't do, because they cannot afford to.