What is a pre-sale? Is the deluge of sales not enough? ;)
I guess joveian was referring to "spring sale warm-up" or something like that they did before this year's spring sale.
Yes, not just the explicit pre-sales like that but they have also sometimes had weekly or special sales that have quite a few more games in them than usual right before a big sale.
To be honest, the current saturation of promotions makes me less interested in the upcoming summer sale.
It is the second best sale of the year, so it is much better to ignore all of the small sales. Individual games might occasionally get better prices at other times but in general if you want to buy games at one time of the year the Winter Sale is likely the best and if you want to buy a second time the Summer Sale is the second best. Of course many games have the same price at all of the major sales they are discounted in, but it seems the small sale prices are usually a fair amount higher.
Let's see if GOG addresses the elephant in the room...