I've never pushed credit cards or travel insurance on my blog and do not expect I ever will unless it's truly something I would recommend to people (same goes for any gear or hotels if I start accepting freebies).

My biggest frustration with other travel blogs is that people write about and review things they haven't even experienced. I can't count the number of blog posts about "Top XX Best Trips" or "Top XX Hotels in the World" when the writer is just basing their opinion and providing statements they've found from other online sources.