wow you made great analysis regarding top websites and honestly many of the websites are new to me and i gained good knowledge regarding crypto currency websites after reading your post, well i have experience using raiblocks actually they giving free Nano coins early on when nano named as Mrai and that's why their is huge amount of traffic comes on their website every day and after 1 year they close the free giveaway, thanks for sharing your experience regarding such websites with us, Stay blessed