Front door - Which provider is recommended?

... especially if you already know beforehand that it will be repeated next year. ;)

Yes, although that would reveal the strategy to a few people, it wouldn’t change much in the event of a serious shortage in overall leverage. The majority doesn’t look at it more closely. One year is simply not a short enough period for a decision, the customer has too much time to change their mind...

Sales tool, all prices are expensive according to the price list, and due to promotional goods, 80% of decisions are concentrated on a few items, production control after all

Yes, exactly. There are many reasons for that, pure warehouse sales are outdated. The strange thing is that it really works well, even though everyone claims they are not receptive to it. But whoever says that is lying (or simply mistaken).

The offers make the most sense at the beginning and end of winter because that is when people are most likely to become aware of drafty windows. "We probably need to address this soon" - "yes, let's take care of the front door first, and if the company does a good job, we'll save up for the rest and then go to the bank." Speaking of which, does anyone already have statistics on Christmas 2020, without [Corona] December is usually at least a quarter for retail?

Yeah, online retail is exploding (actually across all industries) while brick-and-mortar retail is correspondingly poor. In the overall market for consumer electronics, this balances out to slight growth.