I do not understand people with allergy to non OSS. Compare that to any google service which barely releases the clients as open source, and the clients usually are so complex that may need quite long time to get any professional developer productive in such complex code bases. Also being tied to a controlled protocol, set of libraries, cloud infrastructure which does actually keep your data is in fact the actual evi…
What about rights to study, modify, share the software? Yes, sometimes they are important: https://www.gnu.org/philosophy/free-software-even-more-impor...