There's over 35 sign up offers on there, so if they are the only 2 you've got I'd say you could make plenty. I made £37 from those 2 , but am now up to £196 profit in 4 days... Funny thing is I'm actually really enjoying it, which I didn't think I would. Only thing I'd say is that if you already have a coral account, you'll need to watch the videos for the coral offer as that where they show you what to do. You could still do the ladbrokes offer for free and see what you think.
Speaking to a few people on their fb group I'm hoping to make £1k for December and that will easily sort Christmas out, they seem to think that's achievable, but I don't have any betting accounts.