Just to add to this,
I also have this concern - It does seem to good to be true.
As a hobbyist I have finally found something which is a full product on which I can invest time in and learn. I think it fills a massive hole by allowing a new user to gain confidence and progress to a reasonably high level without having to sell a kidney and half my liver to do so!!
Because of the licensing method that Autodesk is using, I am seriously considering starting a small business to make various small 'widgets', this wouldn't happen if I had to sell body parts to get started. What I am not prepared to do is pay thousands pounds for software and then get stung again for 'support' and updates THEN find I need another module - another thousand etc - this does not instil any loyalty in me whatsoever!
Fusion is great. It is a full blown product that doesn't try and rip you off, other than functions, because of the response in the forums and the frequent updates I WANT to use with the addition to a nice knowledgeable community all helping each other - especially with the fast response times.
So Autodesk, in the future do you want to fall in to the trap of selling one license costing many thousands or selling thousands licenses for 10s/100s. The latter breeds loyalty and because of a low price becomes the normal go-to piece of software for small to medium engineering firms which everyone in uses (think MS Office in the early days). The end result is the same and you crush the competition.
If you're not greedy and specifically try to make money on the back of us, we will make you a fortune in the coming years.
Matt