Lyon Air Museum - Founded by General William Lyon and located at John Wayne Airport (KSNA) Orange County, CA USA πΊπΈ @lyonairmuseum @martinaviation
Outreach This Creator For FreeOn Instagram, Mark Foster is a Personal blog creator based in United States with an audience of 21.3K. The account has published 2,213 posts, currently around 3 posts a week. Typical posts draw 115 likes and 6 comments, putting engagement at 0.57%.
With 21.3K followers across 2,213 posts, Markrfoster is one of the Personal blog accounts tracked in the InstME index.
Measured against other accounts with 10Kβ100K followers, Markrfoster's 0.57% engagement rate lands below the median.
For roughly every 19 likes there is one comment, an unusually discussion-heavy audience.
In recent weeks Markrfoster has kept to about 3 posts per week.
Markrfoster scores 94/100 on InstME's audience-quality checks, with about 5% of followers flagged low-quality or inactive, a strong signal of genuine reach.
Estimated sponsored-post value
$74β$140
Based on 21.3K followers and a 0.57% engagement rate, a single sponsored post by Markrfoster is worth an estimated $74β$140. This is a modeled range, not a quoted rate, actual pricing varies by niche, content format, usage rights and exclusivity.
Audience Health
~5% of followers look low-quality or inactive.
View Full AuditThereβs more behind this audience. See what the full audit reveals.Content Focus
Primary: Personal blog
| Metric | Markrfoster | Cohort median |
|---|---|---|
| Engagement rate | 0.57% | 1.45% |
| Average likes | 115 | 339 |
| Average comments | 6 | 18 |
| Posts per week | 2.93 | 0.52 |
Median values from 146,020 accounts with 10Kβ100K followers in the InstME index, refreshed Jul 19, 2026.
| Metric | Markrfoster | Cohort median |
|---|---|---|
| Engagement rate | 0.57% | 0.9% |
| Average likes | 115 | 193 |
| Average comments | 6 | 10 |
| Posts per week | 2.93 | 0.63 |
Median values from 24,951 accounts in United States with 10Kβ100K followers in the InstME index, refreshed Jul 19, 2026.
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Last reviewed: Jul 9, 2026
Mark Foster is a personal blog creator based in United States on Instagram, with 21.3K followers.
Mark Foster posts on Instagram as @markrfoster.
Mark Foster has 21,279 followers on Instagram (21.3K) as of Jul 9, 2026.
Mark Foster's engagement rate is 0.57%, calculated from average likes and comments per post relative to followers.
Posts by Mark Foster average 115 likes and 6 comments.
Mark Foster posts about 3 times per week on average.
InstME's audience-quality analysis estimates about 5% of Mark Foster's followers are low-quality or inactive, giving an audience-quality score of 94/100.
Mark Foster is registered as a creator account on Instagram.
Mark Foster is categorized as a personal blog account in the InstME index, based on the profile's bio and Instagram category across 2,213 posts.
Total Posts
2,213
Avg Comments
6
Engagement
6.66%
Mark Foster's profile places the account in United States. Location comes from public profile signals, so treat it as the account's stated market rather than a confirmed address.
A sponsored post from Mark Foster is estimated at $74 to $140. This is a model based on audience size and engagement, not a rate card, so real pricing is set by the creator.
