Limit on invites?

Is there a limit on how many invites to like a page you can send out every day? Cause I have 4k friends and I invited them all to like 2 of my friends pages and everything was fine and the invites got sent out and they got likes. But when I tried to send invites to them all to like a 3rd friends page it isnt sending or letting me? Usually when you invite someone their name goes grey or what ever. I invite them and will refresh and it says I can invite them again? What am I doing wrong lol does facebook have a limit?