Is go daddy a good hosting option if I want to start small and scale to hundreds of thousands of users?

Having worked a consultant with global consulting firms and served over fifty of the Fortune 500 companies, I have been a consultant for over 15 years. Although the type of work will vary, consultants need to know why they are being hired. What does your client expect from you? If consultants are armed with that knowledge, they can best apply their skills. I have seen many consultants who jump right into the problem without understanding the context of why they were hired and what success will look like from the client's perspective. A very specific visual that I use is to imagine what the bullet point on my resume needs to look like after I am done. What am I going to do for the client that they can measure and be happy with that I can put down as an example my advice had on the organization. Once I have that in mind, I make sure the client wants that too and the rest is just doing my job. Another thing that consultants may need to know is the type of company culture. If the organization has a lot of certain types of folks, like passive decision makers, the approach to take will accommodate this. The culture of an organization can shed a lot of light on what a consultant can realistically accomplish, especially as the consultant's approach and personality will have an effect on how successful they can be in that organization. I have worked with some organizations where I was not a good fit, while others made working together easy. Being aware of the culture can help the consultant modify their approach accordingly and even know when they may not be the best fit. It is a mature sign for a consultant to read the problem well enough to know that they are not the best person for the job.

When you go with Cloudflare you will have the ability to use or not use the CDN. The great thing here is you can see if your site has problems quickly. Make sure your QA team goes through your site to ensure you find any issues.

SaaS. Always. I am a founder of a Startup about to launch our first product (mobile app). We looked at this very question. In the end we looked at the impact the decision would have on our company's valuation. Based on my initial, informal discussions with funders in my area (Canadian Atlantic Region) with single point of sale revenue a healthy technical start up is worth approximately 4-6X annual revenue whereas the same company with a subscription or SAAS model is worth 10x and up.

Well if you built the app then I would suggest add a means to allow the community to flag inappropriate messages, then start banning the responsible users.

Denial of Service protection is a key component of your perimeter defense along with your firewall, intrusion detection/prevention and continuous monitoring. There are several managed service providers that you can choose from. The first vendor you should contact is your Internet Service Provider (ISP), they may have DoS services available as a component of your contract or they will have DoS providers they partner with. Once you have identified the services your provider offers or the DoS protection partners they have you can evaluate which is best for you. If you have more questions on this or other security, data protection or regulatory requirements, PCI may be important for you, feel free to let me know. Best of luck in your venture! -Steven