Hi Grant
Is the uk market different, done this with .com getting sponsors based on educational / Research / news site giving free information to the public about the area and thanks on pages to contributors and sponsors, e.g. weather, news reporting sponsored by company a etc, No problems over 2 years (Admittedly USA has different laws state to state and laws governing reporting news and even with copyright if they believe the word to be in common use) had a few attorney letters but sent them reply to take any further correspondence with solicitors exclusion clauses, never heard any more...? But have not done this in the UK.
Not selling direct competition items but associated to make it clearer they were sponsoring pages in return for an acknowledgement( yes they had there logo on the pages )
Example.macleans. have copyrights all over the world but in Canada there is www. macleans.ca this is a news site and carries adverts also?
So appreciate opinions and experiance