Do you really not understand how fundamentally anti-open-access Elsevier is? Have you not seen what happens to the other companies they absorb? Many of us have experience in this particular field and it's not a pleasant one.
Your official blog post is inane marketing-speak that has no basis in the reality of the damage Elsevier has done and continues to do to the fabric of science publishing. Mendeley should be ashamed, and you personally should be ashamed for perpetuating this nonsense. Within a year your company will be effectively dismantled and anyone left over who actually cares about open access can start over from scratch. I wish them luck.