I guess I will share my probably unpopular opinion here as well.
A Construct 3 license costs about $99 USD per annum.
For all people that don't know what annum means, it basically means $99 USD per year (365 days).
This roughly translates to $8,25 a month if you would put money aside each month.
$8,25 a month are quite frankly peanuts if you live in a 1st world country and have a job in my opinion.
Let's look at this from the perspective of an individual/hobbyist and a start-up "business".
I would define this group of people to be C3 users which like to work on games and would like to share their work to the public.
Individual/Hobbyist generally have the intention do games as a hobby and usually don't plan on having a large and successful game.
Now to my statement, I believe that if you really consider something as a "hobby", you should also be willing to spend money on it.
To proof that a C3 license doesn't cost that much more than any other hobby costs, let's do a quick comparison to make things a little more clear.
Common Hobbies Around The World & Their Approx. Costs**:
Construct 3 > Total Costs: $100 (per year) > Monthly Costs (Savings): $8,25
Cycling > Total Costs: $130 (per year) > Monthly Costs (Tires): $12,99
Gaming > Total Costs: $220 (per year) > Monthly Costs (Games): $20
Musician (Guitar) > Total Costs: $70 (per year) > Monthly Costs (Strings): $5,99
and many more...
My point is:
If you're doing something as a hobby, you should be willing to cover the costs for it.
The case for start-ups, specifically aspiring indie dev's is fairly simple in my opinion.
You would like to make money, you've got to invest money and a price of $149 is reasonable and should be no problem.
The most of the aspiring indie's (including myself) plan to sell their games on Steam.
By selling games on the biggest gaming platform of all time, it's pretty much guaranteed that you'll make at least ~$500 within the first 3 months.
My point again:
Consider the license costs as an investment.
I think that Scirra should keep on going with the current pricing model and not make it unnecessarily complex by introducing "modules" (sell parts of the engine for an additional price). If you're not living in a 3rd world country* you should be able to cover the costs of the Personal License, even if you just consider game development as a hobby. Let's be real for a second, you get 365 days to work on your game, isn't that more than enough for just $100?
not meant to be an insult!
**This is meant to be an example, don't expect accurate numbers please.