I agree that a boycott of games with DRM would be the best option but it is impossible to convince a majority to refuse DRM. People wants to play the latest and coolest games more than they care about the DRM.

I don't think Gog will grow faster or more even if they accept DRM, simply because most gamers already have a majority of their games at Steam and want to keep all games in one store. So they will not move to Gog anyway. And then Gog will remain as a small company and we will lose the DRM-free store.