If I can remember it correctly, I only joined 4 ICOs in the last four years of my cryptolife. Technically speaking, out of that 4 coins, I only invested (using BTC)  in 2 of them. The reason behind that is because I only have small amount of BTC available and can't afford to invest more to other ICOs available at that time. For the other two coins, I participated in them by signing up to their signature campaign and accepted their tokens as a payment after their ICO phase.

I would like to add that those ICOs where I invested became successful in their own right and provided me good profit later on. I'm still regretting some of my decisions where I ignored the other coins that available due to insufficient fund or lack of research on my part. Well, we cannot have all the glory and profit especially here in crypto.