[0.15.37] Wrong formula on infinite techs?

[Optera]

All infinite techs except Mining Productivity and Follower Count use a formula doubling the cost every rank.
count_formula = "2^(L-x)*1000"

Mining productivity research cost deviates massively from other inf techs increasing cost only by 100 per rank.
count_formula = "100(L-1)"

Follower count research cost also increases only by 100 per rank.
count_formula = "100(L-6)+900"

Is it intended to have these two techs basically remaining the same price while all others have exponential cost increase?

[Klonan]

Is it intended to have these two techs basically remaining the same price while all others have exponential cost increase?

Yes

[DaveMcW]

In fact, mining productivity cost grows at the same rate the bonus grows. So each level costs exactly the same in terms of raw resources.