To ask what is THE POINT of the M&S SPARKS card?

[Northernlurker]

Because I can see no point at all. I got 20% off food when it started but since then all the offers have been unmitigated nonsense.
I get the emails telling me to activate my offers and I log on to find it's offering me 20% off jeans (in what is supposed to be summer), 20% off blouses (I don't wear them on account of norks, have never bought a M&S bluse), 20% off adored bras whatever they are - see above for norks for why I don't buy M&S because they stop at a flipping G cup and 20% off glasses. I don't want any glasses and if I did I wouldn't buy M&S.

I have 30,000 points. WHAT ARE THEY FOR? I do occasionally get £5 off food vouchers which are very handy, especially if you use them on the self service tills because it doesn't insist you give them up and thus you can use them more than once if you're canny. But is that it?

Just googled 'what is the point of a sparks card' and found this, and my kindred spirits. I have all sorts of loyalty cards and this is the worst by far. It actually winds me up that they ask me to scan it when I shop, why, just why?? I've been food shopping at M&S loads more since lockdown (walkable and amazing bargains at the end of the day, yesterday got seabass, minted potatoes and veg for two of us for today's lunch for £2 total). I thought that big increase in my food shopping there would trigger some kind of relevant offer, but no.... I've got 20% of tights, in June, in a lockdown where I'm only wearing shorts and jogging bottoms. I have 27,000 which means what?? Shouldn't annoy me but it does!