Well I would think definatly to watermark your pics if thats allowed with the license.
I think multiple sponsors might be confusing, but could be done in such a way as to make it clear, like "sponsor #1 vs sponsor #2 who has the best creampies....you decide!" Something along those lines might be able to work.
Maybe just send every link to a review site or hub for the particular niche and then let the surfer decide from there.
Maybe put an email sponsor somewhere in there too.
Just my thoughts, but Im not an LL owner and havent submitted in awhile so I could be totally wrong
