Frequent Miler blog has good additional info.
Status match earns 30 points per dollar, instead of 20 points per dollar. If you don't have any status with any hotel chain, you can get Hyatt Platinum for free with a Visa Signature card.

You have to book through one of the Radisson sites, but Mr Rewards and Top Cashback have 5% cashback for Radisson.com and for Countryinns.com.
According to evreward, you can opt for 3% Amex MRs back too, but I doubt you'd have time to transfer that to BA for the 50% bonus.

This seems to be a no loss gig for me. I'll be doing a mattress run at a $58 Country Inn ($66 after tax) for the 44k points.
I'll then book a Radisson for $80 ($88 after tax).
5% cashback on $138 pre-tax makes $6.90. Totals $147

Earn: 4.5k for having already signed up
44k Country Inn
50k Radisson
1740 points for Country Inn stay if they match my Hilton Gold (30 points/$. Earn.)
2400 points for Radisson stay (30 points/$)
4000 points for booking two stays online as Gold (link)
Total points: 106.6k for having spent $147.

Not too shabby. That's good for up to 11 nights in category 1 hotels, or 2 nights in category 6 (top category) hotels. Or, 100k points is worth an 18k point transfer to United (or other airlines) which is less than 1 cent per point