I think where some people are coming from is, yes this is true if the engagement is genuine. I.e. clicking on links through Bing that you are genuinely interested in is valuable to Microsoft because these clicks are more likely to eventually become sales. When clicks = sales, Microsoft can charge more for ads and promoted links. When people are just clicking links for "Microsoft points" with no intention of buying or engaging then this dilutes the value of clicks to Microsoft.
This applies to any model where a "free" service is provided combined with "incentives" to use that service. It's built into the calculations for profitability.
Some people using Bing don't generate a profit for MS. Just like my usage of Safeway (grocery store chain) coupons likely generates a loss for Safeway. Just today I used a digital offer from them for 5 dollars off any purchase of 5 dollars or more. I spent a total of 5.99 USD which was 0.99 USD out of my pocket.
But the whole thing is built upon the fact that while there will be some users that generate a deficit, there are enough users overall that generate a profit that the whole becomes profitable.
It's the same for any model that involves giving away (or discounting) a product or service in order to drive more people to buy some product or use some service. There's always going to be people that "game" the system, it's expected and accounted for.
I have no doubt that, for example, goonergaz probably generates a net loss for MS, although it might be less of a loss than he thinks it is. But, again, that's expected and accounted for (assuming the people working for MS are competent ... which isn't always a given
).
It's not much different from advertising. A company "gives away" hundreds of millions of USD (to an advertising agency) in the hopes that it drives engagement (purchases, rentals, service contracts, whatever...) with whatever they are advertising.
As for Bing, MS doesn't care if someone starts out just randomly searching for just random things. For example, I started by just doing searches for 10 different colors a day. At some point I noticed that the search results were generally just as good as Google (sometimes Google has better search results, sometimes Bing has better search results) and they were doing some things better than Google (which Google has since copied ... a good thing!) that I started to do actual searches with it.
This was way less of a hassle than trying to remember to do daily searches of X things (at first it was just 10, then it was 30 after a couple of years) for the maximum earnable points. So I just started to use Bing for actual searches.
Now I regularly use Bing. Along with Google and Duckduckgo (when neither Google nor Bing return good results).
Basically, MS just wants someone to use Bing, even if it's robotic usage that is useless for advertising metrics. Because they know that some X number of the Y people using it robotically will likely eventually actually start using it as a search engine for real searches. Obviously some Z number of the Y people will continue to just use it robotically for the points ... but also some number of those will stop even doing that as it becomes too tiresome for the points earned (has happened with a couple of my friends).
Regards,
SB