On Virgin mobile and want 1000 free texts (Not spam)

I received the email below and thought I'd pass it on. The only other section on the email not displayed below asked me to click a link if I wanted to unsubscribe from future emails. I have called Virgin on 789 just now and they advise me it is a proper offer.

I have texted the number above with 'Yes' and I received a text back stating "Thanks for replying! A voucher for 1000 free texts is on its way to you"

Email content is:

Hello,

We love surprises. Big bunches of flowers… little bundles of airtime.

Talking of airtime, we’d like to give you 1000 free texts - just to say thanks for being one of us.

If you’d like them, all you need to do is text ‘Yes’ to 80310 by 25th April. Texts to 80310 cost just 10p and the 1000 texts you get back are absolutely free.

Enjoy texting!

The Virgin Mobile team.