is there a catch?/Rita's opening party

london
I have been at the receiving end of some bad reactions to my giving. And it seems it is not uncommon when i read the comments.
I think everyone thinks that there is a catch somewhere if u offer to give something free to someone. Even i will look for the catch. I think another reason for not accepting someone else's free gift is that it is not wanted. For eg, i might think the £1 off at the topshop is still money off, especially as u r queueing to buy something allready, but maybe others might think it is not much and not worth the hassle.
or maybe people dont like to feel obliged to the giver, as they might feel compelled to reciprocate for something that is given to them which they have not asked for nor want.
I like free offers without any catches.
For eg, for two days running, i have passed yamchacha in pimlico, and both times i got a leaflet offering free tea, without any obligation to buy any thing else. Now that is a generous offer. I have gone in on two days running, and the service was excellent even though it is free. That is really very nice of them. Would people make full use of these free offers, or will people think there is a catch to it and not bother??

Then today, in the daily telegraph i see a voucher of a free £5 gift card from house of fraser, and there is no minimum spend either.
You must bring the coupon to the house of fraser store today or tomorrow, and the gift card can be redeem anytime from now till nov 8. There dont seem to be any catch at all. So we shall see. There is another of these coupons for £5 gift card in tomorrow's sunday telegraph.
I would have brought this voucher to a house of fraser store today,(there is one opposite the westminster city hall in victoria street.) but i had to go to Rita's cafe opening party this afternoon so did not have the time to do so. Only one voucher per customer per day and only today and tomorrow.
theoretically, a person can end up with two gift cards of £5 each.
The cynical reaction is 'what is the catch?' but it seems quite genuine.

Rita's open house at her cafe was quite a success, with lots of people who are her regulars, and friends come to join in, and get a free meal for their efforts. haha.She is at theislander's kitchen, 3rd avenue, brixton village sw9 8ps.
It attracted a white couple who told me they were thinking of eating at another place, and happened to be passing by the cafe, and saw the crowd at Rita's and decided to join in.

The guy said he likes hot and spicy foods, and make his own green curry with chili. He told me a rather interesting belief, that spicy foods increase the metabolic rate and so keep the weight down.That is why he said he eats lots, and yet he is very slim. I wonder whether anyone had tested that, and might that not explain why southern indians who like chilli are majority quite lean.
I was the first to arrive, Rita told me earlier they were swept of their feet with the lunchtime crowd, but i m glad it had quieten down by the time i got there about 2.30pm. And being the first, i got a fantastic meal, leisurely cooked and eaten. Tamarind chicken, followed by steamed sea bass with rice and veg. It was half a sea bass, the head end half, and it was really delicious and so much meat... makes me consider sea bass as another fish to eat apart from my favourite mackerel. And snacks of fried brinjal and mash.
I cannot imagine the westerners liking the fish with its head, but Rita says it is very popular, and no wonder , the normal price for such a dish is £3.50 for a meal including veg and rice. Of course most of them might ask for the tail end, though most chinese knows the meat at the head end is the most succulent.
I stayed on to help, washing up the dishes and cutlery, so she did not run out. And everyone had a lovely time.