Cannot say how many (the amount) I have followed. from what I remember, I followed ICO more than IEO (investing and joining bounties) , I got a lot of profit when the project wasn't as much as it is now. after the existence of IEO, if I'm not mistaken I only followed less than 10 and the success was only around 3. I experienced a lot of losses in IEO compared to ICO, and now I've stopped.