If you often follow the discussion in the official freebitcoin thread then you will find that a lot of abuse is done to reach 100K RP by using bots. But the changes they make are still interesting, the free btc bonus now only requires a lower RP than usual, you can choose WoF or FUN Tokens substitute of RP Bonus, but if you are a member who gamble more often than spin a free rolls, then this change will not affect your desire to play right?
It is natural that there is abuse of Btc Bonus claims made to take advantage of actions that are detrimental to Freebitco.in. They've been in operation for too long, but it's amazing to have survived this second. Because back then we could easily claim some Satoshi. Now it's natural to no longer give rewards, considering the difficulties obtained from mining results, freebitco.in should be even stricter with those who abuse the site for abundant profits.
Yeah, every reward points/perks/bonus either crypto or non-crypto is subject for abuse as long it's easy to earn and done. And as a business securing their funds can be used on other promotions/rewards.
Despite of running freebitco.in in a very long time and already built trusts they still offer such rewards which is a bit unexpected for them but it just show they care and is really a customer service.