I’m not sure about consensus, I started with $2, 4, 8 two years ago. At my first year I revised to $3, 6, 9. I had some lost pledges entirely, but most bumped to $6 or $9. I had one bump (down) to $3. All new patrons have been the new tiers, a majority of new recent pledges have been $9, a few less recent pledges were $6.
That’s not saying there are many pledges. I have 8 patrons.
I did not have a revision this year, and actually did not celebrate the two-year mark by any measure. I might consider a revision next year; however, if not, I’m fairly certain I will do another tier revision in the following year. At the next revision I will probably be considering $5, 10, 15. I might dip that to $4, 8, 12. It is hard to project too far on pricing.
I hired a paid consultation from another creator at the one-year revision ahead of making changes, and I announced the changes 90-days ahead of unpublishing the older tiers. I sent messages to patrons for months encouraging them to consider the upcoming change. A few did not respond, and I let it go for a few months then sent messages to remind them they were missing out on content without making a change to a published tier. A few final patrons responded. Then the final patrons dropped after around six months without getting content.