They were charging $100/yr [1]. Literal peanuts. Actually, that is unfair to the peanuts, it is literal pocket lint.
The average cost of a developer is more than $100/hr. mold needs to make you 0.05% (not 5%, 0.05%) more productive to directly pay for itself. If mold saves you 13 seconds a day in linking time it directly pays for itself. This ignores the knock on effects of reduced build time shortening the feedback cycle which completely dwarf the direct benefits.
It is ridiculous that such dirt cheap pricing for tools is viewed as a problem. As we saw in a post yesterday [2], this is why they say there is no money is tools.