Has Nationwide found a winning formula with its cash bonuses?

Banks have many tricks up their sleeves to try to attract customers and reward loyalty but Britain's biggest building society Nationwide appears to have hit upon a winning formula.
Its Fairer Share payments are back for a third year, with a £100 bonus for qualifying members.
Fairer Share has been credited with helping boost Nationwide's already strong position in the current account market.
The payments were announced as Nationwide posted bumper pre-tax profits of £2.3billion in the year to April, up from £1.77billion last year, after recording its highest ever year for growth in mortgage lending and current account balances.
But not all members are getting a Fairer Share payment and some aren't happy about that. Should they complain? After all, the criteria has been the same for three years now.
On this episode of the This is Money Podcast, Georgie Frost, Helen Crane and Simon Lambert discuss Fairer Share and Nationwide's success.
Plus, what are rival banks offering customers to tempt them in - and how should you evaluate the perks?
How rich would you be if you'd bought Nvidia shares throughout the last two decades - or if you had a Delorean time machine to jump into and go back and buy some.
Are we reaching the tail end of the low fixed rate mortage borrowers?
And finally, should you let your talkative partner show people round your home for sale... or would it be bettet to let the estate agent do the job?