I would be interested to know why people think SY made a hash of presenting Smithman's efit on Crimewatch. DCI Redwood expressed the same interest in this sighting as in the two people seen near the apartment on the day Madeleine went missing and 2 charity collectors. All efits were shown.
ETA link to DCI Redwood on Crimewatch https://youtu.be/OZ8jmdWlB8Y?t=1740
On best evidence the Smith efits were constructed around 4 Sep 2008.
On best scientific evidence, efits made 3 days after a sighting are useless. The Smith efits appear to have been made 17 months after the events.
Cites are on my blog for anyone interested.
Moving on to charity collectors, the ones mentioned were probably bogus, but probably only looking to pick up a few euros. There are rules re charity collections. The genuine ones work the busy public places in Luz. The bogus ones do opportunistic visits to quiet properties, then scamper off if they make €5 or €10. I know people who make €4-€5 per hour working in cafés these days, so a tenner in 2007 was a fat fish.
If the two people you refer to are those on 5C, I have no light to shed.