Our authors (at least the smart ones) don't publish in JMIR Res Protoc (JRP) to get "impact factor brownie points" (a notion that demonstrates inexperience and naivety in the research landscape), but to enhance transparency, collaboration, and to establish priority by creating an early record of their research plan and activities (see Why should I publish my protocol or grant proposal?).
The "impact" is measurable in terms of collaborations and successful grant proposals resulting from publication of a protocol, and/or easier publication of the subsequent paper that reports the results (and JRP authors can publish in JMIR with a 20% discount) in high-impact factor journals (some of which now require the publication of a protocol).
We do not calculate an impact factor for JMIR Res Protoc because this would demonstrate a regrettable misuse of the impact factor (see DORA statement). The impact factor is a journal-based average of citations, and should not be misused to deduce the importance or significance of the research proposed or done.