Microsoft seems doomed either way. Microsoft tried to drop their own implementations of OpenID/OAuth providers and they tried supporting IdentityServer and made it a part of some base templates and IdentityServer said that was the reason they "needed" to make it commercial and blamed Microsoft for directing too much traffic their way. If Microsoft builds their own library instead of pointing people to an open source offering it looks like favoritism and competition and "we need to go commercial to survive". If Microsoft points people to an open source offering it looks like "a flood of traffic and we need to go commercial to survive".
Microsoft even donates regularly to things like GitHub Sponsorships and the major open source foundations/conservatories, so even in the case of "too much traffic" it isn't like Microsoft is trying to shirk that bill, even though it is very easy to accuse them of that.
Microsoft even donates regularly to things like GitHub Sponsorships and the major open source foundations/conservatories, so even in the case of "too much traffic" it isn't like Microsoft is trying to shirk that bill, even though it is very easy to accuse them of that.