I've never had any issues with my velcro sticking to cardstock. I do splurge a bit on the velcro though. I only use the 3M brand. I did try an off brand from the dollar store once but it did have the issue where it wouldn't really stick. I don't use the dots. I buy the pack that has a bunch of feet in it on a strip and I cut off little squares. Since you don't see it when it's closed anyway it really hasn't been an issue. Also, just another little suggestion, I always put the fuzzy side on the flap and the scratchy part on the cover so that when its opened and someone who is right handed is writing on the notepad their hand isn't getting all scratched up by that velcro piece.
I'm on vacation as of 5pm tomorrow afternoon and I can't wait! It's going to be a stormy, rainy weekend so I plan on bunkering down and tackling my craft sale item list. I've made a list of items I'd like to make and desired quantities so I'm hoping to make a huge dent in that list! Assembly line ahoy! lol