Where's the postbox? <a href=" http://www.centerdrill.eu/can-i-buy-sumatriptan-over-the-counter.pdf#claims ">sumatriptan cheaper than imitrex</a> Ms. Mayer's blockbuster acquisition of Tumblr, which has more than 100 million blogs and generates very little revenue, also is a risky, long-term bet on introducing a younger demographic to Yahoo's services. Some analysts and tech-industry observers say Tumblr's value was falling, not rising, when Yahoo bought it.