Claiming freerolls itself is not really worth the time. The basic reward of 7 sats, at the current price, converts to only 0.2 cents/roll. Assuming it takes about 5 seconds per roll, even if you had unlimited rolls, that would only convert to earnings of $1.44/hour. So you'll be better off just throwing a couple of bucks in to either buy some bitcoin or fun tokens.

Fortunately, the site has other features and bonuses (WoF, lottery, reward points, golden tickets etc)  that make it worth it.