I was wondering the same, got that email too.
But I had an account there before, then the closed down about a year ago or so, no idea if you have to open a new one or if thats seen as multi-accounting.
Made one or 2 deposits there in the past.

Think I'll wait and see, no space on my HD atm anyway..

I couldn't get the $20 free.....

You need to receive an invitation....

CS credited me the 20.00 bonus after registering, thanks TaaaDaaa, August
    

Please wait for a site operator to respond.

You are now chatting with 'Eve'

Eve: Thank you for using Live Chat. My name is Eve how can I help you?

taadaahhh: hi

taadaahhh: I had an acct with freespin casino before

taadaahhh: but I received an email today, I registered an accout again today

taadaahhh: am I considered to have multiple accts?

Eve: What did the email say?

taadaahhh: that freespin casino reoopen

Eve: I do not see any other accounts opened.

taadaahhh: Hello xxxxxxxxx, Free Spin Casino is the place to be! We’d like to invite you to open a new account with us today at Free Spin Casino! With over 180 exhilarating games, dazzling graphics and fantastic jackpots to be won, you'd be crazy to miss out! Whether you're into the spin of the slots, the flip of the cards, or the lucky roll of the dice, we've got it all here at FreeSpin. And with fresh and exciting new games added every month, the fun is endless! What’s more, we're treating you to a spectacular welcome gift: We're also giving you a special bonus of 10% extra until the end of May. This amazing promotion won't last forever so hurry up and register for some gaming glory! The fun awaits you at FreeSpin!

Eve: I can credit the %20 free from the email you received.

taadaahhh: my username for the one I just opened minute ago is taadaahhh

taadaahhh: the acct I had with freespin casino was also under xxxxxxxxx@yahoo.com

Eve: Let me check

Eve: I have credited $20 to your account

taadaahhh: thanks

taadaahhh: my question is

taadaahhh: do they still keep my old acct?

taadaahhh: the acct I had with freespin about 2 years ago

Eve: No this is the only account I found in the system.

Eve: We are under new management

taadaahhh: great, I just want to make sure I won't be considered as having multiple accts, that's all

taadaahhh: thanks alot eve

Eve: No, not at all

Eve: You are most welcome