Yes, stock-based comp (primarily in the form of RSUs, not ISOs) are a large part of their overall costs.

Professional investors should stick to investing, product management is clearly not their strong suit based on this laundry list of proposals. :)

No. There are basically 5 ways make more money as a company. Professional investors usually have a better handle on these than the companies themselves.

Time and time again, companies come up with supply driven theses that give birth to products that fail. Demand driven products succeed. Knowing when to engage in M&A, sell assets, cut costs, expand to new markets and engage in corporate actions requires judgement that few companies have. It's not always about iterating on the product you already have.

Facebook understands this which is why they have made several key acquisitions. They're looking to be the home of the best innovations in social media; whether it comes from internal sources or external teams.

In Twitter's case, they have hit the limit of mind share in most markets. Everyone knows about it; few on the margin have incentives to sign up. Periscope has potential if data costs come down.

Being able to enumerate a list of classes can be helpful for categorizing a set of actions into a framework, but it doesn't give you much insight into whether or not a particular action is likely to produce the effect you're looking for. In the specific case of Twitter, I think stopping product development on Twitter the product would be a losing strategy. Keep in mind Periscope has at least in part been successful because it can piggy-back on the Twitter network. That network is not a static asset, it must be invested in to continue to hold value.

Your assertions are based on? Intuition? Mine are backed by data from market studies. Twitter is a known quantity and those who haven't signed up don't because they don't have a need to. Social networks are valuable because of the type and quantity of people there. You can do many things to monetize that. Not much you can do when that number doesn't grow. Notice the stock has fallen despite revenue growth being spectacular.

This is why people in industry don't always make it as CEOs. Knowing which game to play is key. Thinking like an investor is key too. Don't take it from me; take it from Buffett.

As an investor, I've made north of $5M on Twitter stock. At this point I hold 0 -- because I believe MAUs are dead in the water. I believe they'll be acquired and become a footnote in history.