Is it fine to promote site1 with watermarked pics from site2 ?

[MrYum]

That's the big issue. If the reviewer doesn't already know both sites are owned by the same company, it's a pretty good way to get declined. A lot of reviewers don't have the time to track down ownership of those images.

I just ran into this with a regular submitter a couple days ago. I did try to get to the affiliate site to check ownership...turns out the affiliate site is down. I spoke with my submitter and he confirmed that in fact the sites in question had the same ownership and they had approved his using one to promote the other.

However, had this not been a regular submitter...that would have been a decline. Personally, don't think I'd ever use mis-matched watermarks period.