That's great to be treated well like that.
So for Aventura, it's 100 points per dollar. So if the flight cost $1000, that's 100,000 points. Business class is usually 3x the cost (or more), so that's at least 3x the points.
Now I'm not sure how fast they accumulate, but we got about 300,000 in a year, and probably would have got closer to 500,000 but we switched back to using Aeroplan when I made our last big fertilizer purchase in December.
For Aeroplan, we probably get about 400,000 points a year, and typical Europe round trip tickets are probably around 70,000 points. But Aeroplan seems to have a better deal on business class. Business class to Europe would be about 150,000 to 160,000 points per person. Also Aeroplan allows changing of any part of a ticket for $75 a person per leg, which is not bad really. We've changed tickets mid-trip before. And you can cancel them for a full refund up to 22 days prior to the trip, which is really nice. Not sure about Aventura in that regard.
If I think of it later I'll look on Aeroplan and get some real numbers to post here, rather than just guessing based on previous trips.