For about the past year my partners have been pushing me to write up some thoughts on AdTech investing. “We’re not AdTech investors,” I’d push back, “we just have a bunch of companies in the portfolio that are working in and around online advertising.” And for a while that worked pretty well. Most of our AdTech investments would be labeled “glue” (they were all connecting or intermediary technologies – just applied to online advertising). Then Jason came up with the name “Adhesive” which seemed to stick (that was bad, wasn’t it) and after a few months procrastinating I ended up writing up our thoughts on AdTech investing and posted them today over on the Foundry blog. And while I really…